Carpet of Spikes (BTD6): Difference between revisions
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'''Carpet of Spikes''' is the [[Spike Factory (BTD6)|Spike Factory]]'s path 2 tier 5 [[upgrade]] in ''[[Bloons TD 6]]''. It grants a passive Spike Storm ability every 15 seconds, which is not | '''Carpet of Spikes''' is the [[Spike Factory (BTD6)|Spike Factory]]'s path 2 tier 5 [[upgrade]] in ''[[Bloons TD 6]]''. It grants a passive [[Spike Storm (BTD6)|Spike Storm]] ability every 15 seconds, behaving identically to its activated Spike Storm ability, which is mechanically unchanged from the previous tier (only the spike stats are changed). Notably, this attack's minimum cooldown is the same as its default cooldown (both 0.04 seconds), meaning it does not benefit from any attack speed buffs unless its attack speed is being reduced by something like a [[Jar of Pickles]]. The passive and activated Spike Storms cannot both fire simultaneously. | ||
Additionally, all of | Additionally, all of the Spike Factory's spikes deal +2 damage and have +5 pierce, and the main attack gains +100% increased attack speed (0.525-second attack cooldown) and more range (50 instead of 34). Both the main and ability spikes deal 3 damage, +7 to [[MOAB-Class Bloon|MOAB-Class]]. Each spike pile has 10 [[pierce]], or 15 with the 1-5-0 crosspath. Passive and active Spike Storm spikes last for 18-22 seconds (36-44 seconds with 0-5-1) and can persist across 1 round. | ||
==Stats== | ==Stats== | ||
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{{BTD6 last updated|51.2|section=yes}} | {{BTD6 last updated|51.2|section=yes}} | ||
Carpet of Spikes is a solid T5 for its high global MOAB-class damage. Its main strength is against low-density rounds, including most DDT and BAD rounds in CHIMPS, favoring maps with less track length for higher spike density. It struggles with dense rounds and especially Ceramics, and should be paired with towers with strong cleanup | Carpet of Spikes is a solid T5 for its high global MOAB-class damage. Its main strength is against low-density rounds, including most DDT and BAD rounds in CHIMPS, favoring maps with less track length (and less non-simultaneous lanes) for higher spike density. It struggles with dense rounds and especially Ceramics, and should be paired with towers with strong Bloon cleanup. [[Lord of the Abyss]] is a natural partner, with good cleanup and a pierce buff that directly boosts Carpet of Spikes' damage, but {{BTD6|The Bloon Solver}} is also a solid choice. Since most of its damage comes from the global Spike Storm activations, Carpet of Spikes has similar strategy regardless of map. | ||
Top crosspath is optimal in most cases, omitting [[White Hot Spikes (BTD6)|White Hot Spikes]] when unnecessary, but bottom crosspath with 0-5-2 is favored on maps with alternating lanes such as [[Bazaar]], [[Muddy Puddles]] or [[Erosion]] (which has a singularly unfavorable interaction without [[Smart Spikes (BTD6)|Smart Spikes]]). However, the Carpet of Spikes is generally weaker overall when forced into this option, because its Spike Storms cannot utilize [[Smart Spikes]]'s attack speed buff, and the spike lifespan increase from [[Long Reach (BTD6)|Long Reach]] is primarily useful on longer maps, or when spikes are allowed to build up over time—which requires that Bloons are already dealt with efficiently. | |||
In [[Boss Events]], Carpet of Spikes can be used against tier 1 and sometimes tier 2 bosses. While its long-term damage is lower than {{BTD6|M.A.D}} and [[Golden Justice]], it has good burst damage potential for instakills. In this context, 0-5-2 is the better crosspath for targeting main attack spikes a certain distance off from the track so they can only hit the Boss, and for the Smart Spikes speed boost at the start of the round. Leave the Spike Factory at 0-4-2 before spawning the boss, then right after spawning the boss upgrade to 0-5-2 to get an immediate Spike Storm activation. On tier 2 onward, since Carpet of Spikes can no longer instakill, 1-5-0 stands out more, but {{BTD6|Spike Storm}} spam can still instakill at this point. Lych and Phayze are its best matchups due to their lack of stuns or high density Bloon rushes, though 2-5-0 can also perform well against the first 3 phases of Dreadbloon. | |||
==Update history== | ==Update history== | ||
Revision as of 03:23, 6 September 2026
For the upgrade in Bloons TD Battles 2, see Carpet of Spikes (Battles 2).
Carpet of Spikes
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 Regularly sets a carpet of spikes over the whole track.
|
| Tower | Spike Factory — Path 2 — Tier 5 | |
|---|---|---|
| XP cost | 35,000 | |
| Cash cost | $34,850 — Easy $41,000 — Medium $44,280 — Hard $49,200 — Impoppable | |
Carpet of Spikes is the Spike Factory's path 2 tier 5 upgrade in Bloons TD 6. It grants a passive Spike Storm ability every 15 seconds, behaving identically to its activated Spike Storm ability, which is mechanically unchanged from the previous tier (only the spike stats are changed). Notably, this attack's minimum cooldown is the same as its default cooldown (both 0.04 seconds), meaning it does not benefit from any attack speed buffs unless its attack speed is being reduced by something like a Jar of Pickles. The passive and activated Spike Storms cannot both fire simultaneously.
Additionally, all of the Spike Factory's spikes deal +2 damage and have +5 pierce, and the main attack gains +100% increased attack speed (0.525-second attack cooldown) and more range (50 instead of 34). Both the main and ability spikes deal 3 damage, +7 to MOAB-Class. Each spike pile has 10 pierce, or 15 with the 1-5-0 crosspath. Passive and active Spike Storm spikes last for 18-22 seconds (36-44 seconds with 0-5-1) and can persist across 1 round.
Stats
For a complete list of Spike Factory stats, see Stats:Spike Factory (BTD6).
This data was last updated for: version 55.1
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Costs and sell values
Note: this list does not factor in Monkey Knowledge or other discounts.
| Tiers | Total cost | Sell value | ||||||
|---|---|---|---|---|---|---|---|---|
| Easy | Medium | Hard | Impoppable | Easy | Medium | Hard | Impoppable | |
| 0-5-0 | $44,965 | $52,900 | $57,135 | $63,480 | $31,476 | $37,030 | $39,995 | $44,436 |
| 1-5-0 | $45,645 | $53,700 | $58,000 | $64,440 | $31,952 | $37,590 | $40,600 | $45,108 |
| 2-5-0 | $46,155 | $54,300 | $58,650 | $65,160 | $32,309 | $38,010 | $41,055 | $45,612 |
| 0-5-1 | $45,095 | $53,050 | $57,295 | $63,660 | $31,567 | $37,135 | $40,107 | $44,562 |
| 0-5-2 | $45,435 | $53,450 | $57,725 | $64,140 | $31,805 | $37,415 | $40,408 | $44,898 |
Strategy
This section was last updated for: version 51.2
Carpet of Spikes is a solid T5 for its high global MOAB-class damage. Its main strength is against low-density rounds, including most DDT and BAD rounds in CHIMPS, favoring maps with less track length (and less non-simultaneous lanes) for higher spike density. It struggles with dense rounds and especially Ceramics, and should be paired with towers with strong Bloon cleanup. Lord of the Abyss is a natural partner, with good cleanup and a pierce buff that directly boosts Carpet of Spikes' damage, but The Bloon Solver is also a solid choice. Since most of its damage comes from the global Spike Storm activations, Carpet of Spikes has similar strategy regardless of map.
Top crosspath is optimal in most cases, omitting White Hot Spikes when unnecessary, but bottom crosspath with 0-5-2 is favored on maps with alternating lanes such as Bazaar, Muddy Puddles or Erosion (which has a singularly unfavorable interaction without Smart Spikes). However, the Carpet of Spikes is generally weaker overall when forced into this option, because its Spike Storms cannot utilize Smart Spikes's attack speed buff, and the spike lifespan increase from Long Reach is primarily useful on longer maps, or when spikes are allowed to build up over time—which requires that Bloons are already dealt with efficiently.
In Boss Events, Carpet of Spikes can be used against tier 1 and sometimes tier 2 bosses. While its long-term damage is lower than M.A.D and Golden Justice, it has good burst damage potential for instakills. In this context, 0-5-2 is the better crosspath for targeting main attack spikes a certain distance off from the track so they can only hit the Boss, and for the Smart Spikes speed boost at the start of the round. Leave the Spike Factory at 0-4-2 before spawning the boss, then right after spawning the boss upgrade to 0-5-2 to get an immediate Spike Storm activation. On tier 2 onward, since Carpet of Spikes can no longer instakill, 1-5-0 stands out more, but Spike Storm spam can still instakill at this point. Lych and Phayze are its best matchups due to their lack of stuns or high density Bloon rushes, though 2-5-0 can also perform well against the first 3 phases of Dreadbloon.
Update history
For a complete list of Spike Factory changes, see Update history:Spike Factory (BTD6).
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Overall cost reduced by $500 (due to cost changes for previous tiers)
Ability: Spike lifespan reduced ― ∞s → 9–11s
Passive ability: Now activates Spike Storm every 20s instead of once at the beginning of each round- Description changed
Before Sets a carpet of spikes over the whole track, every round. After Regularly sets a carpet of spikes over the whole track.
- Upgrade cost reduced ― $50,000 → $42,000
- Overall cost reduced by $9,500 (due to cost changes for previous tiers)
- Damage to MOAB-Class increased ― +4 → +5
- Base damage increased ― 2 → 3 (bug fix)
“
[W]e made a couple small tweaks buffing what should be the ‘strength areas’ of a few of the more underperforming high tier Spike upgrades.
— Update notes
— Update notes
”
- Passive ability activation: Cooldown decreased ― 20s → 15s
- 0-5-1, 0-5-2
- Ability: Projectile lifespan with Long Reach increased ― 9s–11s → 15s–16.5s (50% longer)
“
We quite liked how the lifespan changes for xx1 spikes went previously, though this still wasn’t enough to make the path competitive and increasing this number further wouldn’t have much of an impact since most earlier rounds aren’t long enough. Spiked Balls strats have also felt too strong compared to higher tiers on top path, so touching on all of these issues slightly the base lifespan of spikes has been reduced [...] We have also made changes to give more purpose to 042 Spike Storm and allowed x5x Carpet of Spikes to save its cooldown so it is no longer required to avoid saving to be used in reliable strategies.
— Update notes
— Update notes
”
- Passive ability: Now saves cooldown when saving
- Base projectile lifespan reduced ― 70s → 50s
- Note: Long Reach lifespan remains at 100s
- 0-5-2
- Smart Spikes now causes the ability to only target active paths (e.g. Bloody Puddles)
- Smart Spikes now causes the passive ability to only target active paths (e.g. Bloody Puddles)
“
Like a few other towers before it, the attack speed crosspath for Spike Factory has outshined the others. We have reworked the lower Spike Factory tiers to distribute this power more evenly while keeping high tier factories at a similar level of power.
— Update notes
— Update notes
”
- Upgrade cost reduced ― $42,000 → $40,000
- Rate increased ― 0.99s → 0.98s
- 0-5-2
- Now correctly works on splitting tracks (bug fix)
“
Due to a number of performance concerns, the ability for the Spike Storm factory will no longer be able to benefit from a denser storm of spikes via stacking speed buffs on the base tower.
— Update notes
— Update notes
”
- Ability: No longer is affected by rate buffs
- Note: Overclock rate buff does affect Spike Storm ability with Call To Arms or Homeland Defense. Other rate buffs may also work but need to be tested.
“
While we feel speed interactions for Spike Storm was a necessary evil for performance related concerns, we did not want to kill off self synergy contained local to the tower, so we are trying out an exception to this rule for the 042 crosspath. Additionally, due to the large annoyance in using spike storm in bosses due to the persistent rounds a boss will last for, Spike Storm will now be allowed to carry over one round before being cleaned up.
— Update notes
— Update notes
”
- Ability: Spikes now carry over one round
- 0-5-2
- Ability: Now benefits from Smart Spikes' speed buff
“
To help make the tradeoff of building one T5 over multiple T4 not be as hard a choice, the basic attack on Carpet of Spikes has had power increased significantly over rate, range & damage.
— Update notes
— Update notes
”
- Main attack: Range increased ― 34 → 50
- With X-X-1 Long Reach crosspath ― 42 → 58
- Main attack: Attack cooldown reduced ― 0.98s → 0.33s (attack speed increased by 196.97%)
- Damage per spike increased ― 3 → 4 (affects both the main attack and ability)
- 0-5-2
- Smart Spikes start of round buff no longer applies to Spike Storm (undocumented)
“
Carpet of Spikes still fails to see love over multiple T4's, so rather than making it cheaper we like an all-round increase to the MOAB bonus.
— Update notes
— Update notes
”
- Main attack: Damage bonus to MOAB-class increased ― +4 → +5
- Passive and Ability: Damage bonus to MOAB-class increased ― +4 → +5
“
A flat pierce increase is added on to middle T5’s base attack to reduce crosspath dependency & improve r100 strength.
— Update notes
— Update notes
”
- Spike pierce increased ― 5 → 10
- Note: Affects both the main attack and ability's spike piles
- With 1-X-X Bigger Stacks crosspath ― 10 → 15
“
The mid spike factory by many players has been ignored outside of few very specific situations for a long time and after fixing some issues, mainly a bug with the shotgunning of projectiles as they spawn, we’re trying a large power increase to more effectively balance the Shredder for its MOAB Damage purpose.
— Update notes
— Update notes
”
- Main attack: Attack cooldown reduced ― 0.33s → 0.49s
- Main attack: Bonus damage to MOAB-class increased ― +5 → +9
- Ability attack: Bonus to MOAB-class increased ― +5 → +9
- Using the Carpet of Spikes active ability just before the passive ability triggers will no longer cause Carpet of Spikes to skip a passive ability activation (bug fix)
- Spike Factory no longer can shotgun spikes for exactly one frame after spawning (bug fix)
“
Similar to Mortar it’s great to see the fresh love for middle path Spike Factory, however as they are feeling exceptionally good now for the intended pure MOAB damage role we want to cut it back very slightly so it doesn’t stay quite so crazy over our holiday break.
— Update notes
— Update notes
”
- Main attack: Damage per spike reduced ― 4 → 3
- Damage to MOAB-class per spike reduced ― +9 → +8
“
Middle spactory buffs were a fair amount overdone, cutting back more on this.
— Update notes
— Update notes
”
- Ability: Cooldown increased ― 40s → 45s
- Damage to MOAB-class reduced ― +8 → +7
“
Spike Storm is now exceptionally strong so the ability cooldown is increasing a small amount along with the T5 cost. This comes along with a crosspath rebalance granting more 042 lifespan.
— Update notes
— Update notes
”
- Upgrade cost increased ― $40,000 → $42,000
- Ability: Cooldown increased ― 45s → 50s
- 0-5-1, 0-5-2
- Ability: Long Reach increases the lifespan of spike piles further ― +50% → +100%
- With X-4-X crosspath: 15s–16.5s → 18s–22s (due to this change stacking with a nerf to the non-crosspathed lifespan)
- With X-5-X crosspath: 27s–33s → 36s–44s
“
Spike Factory is currently overperforming on every path, and as it also happens to have one very dominant crosspath choice we’ve opted to nerf that crosspath as an overall nerf to every path.
— Update notes
— Update notes
”
- Overall cost increased by $1,000 (due to cost changes for previous tiers)
“
While this won’t change the effective DPS of spike storm at all, the ability will now occur over a slightly longer duration to reduce the effective ‘instapop’ on many targets and give more time to see what’s going on.
— Update notes
— Update notes
”
- Ability: Duration increased ― 1s → 2s
- Ability: Minimum attack cooldown increased ― 0.02s → 0.04s
- Ability: Attack cooldown increased ― 0.02s → 0.04s (attack speed reduced by 50%)
“
Spike Storm’s price is being increased with Carpet of Spikes remaining the same total cost, [...]
— Update notes
— Update notes
”
- Upgrade cost reduced ― $42,000 → $41,000
- Overall cost is unchanged (due to cost changes for previous tiers)
“
Carpet of Spikes attack rate was slightly faster than intended likely due to a previous balance change not carrying up correctly, the upgrade is performing a little good right now anyway so this formula has been corrected
— Update notes
— Update notes
”
- Main attack: Attack cooldown increased ― 0.49s → 0.525s (attack speed reduced by 6.67%)
Gallery
For more Spike Factory images, see Gallery:Spike Factory.
Screenshots
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Carpet of Spikes for all upgrades
Assets
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Portrait -
Upgrade icon -
Insta Monkey icon
In other languages
| Language | Name / Description | Notes | |
|---|---|---|---|
| Arabic | سجادة من الأشواك/المسامير وضع سجادة من السنون والنتوءات بشكل منتظم على المسار بالكامل. |
— | |
| Danish | Sømtæppe Lægger med jævne mellemrum et pig-tæppe ud over hele banen. |
— | |
| German | Nagelteppich Sendet regelmäßig einen Stachelteppich über die ganze Strecke. |
— | |
| Spanish | Alfombra de clavos Extiende una alfombra de clavos en toda la pista. |
— | |
| Spanish (LA) | Alfombra de clavos Extiende una alfombra de clavos en toda la pista. |
— | |
| Finnish | Piikkimatto Asettaa säännöllisesti piikkimaton koko reitille. |
— | |
| French | Tapis de pointes Place régulièrement un tapis de pointes sur tout le circuit. |
— | |
| Italian | Tappeto di aculei Stende regolarmente un tappeto di aculei sull'intero tracciato. |
— | |
| Japanese | スパイクのカーペット トラック全体に、定期的にスパイクのじゅうたんを設置する。 |
— | |
| Korean | 스파이크 카펫 트랙 전체에 스파이크 카펫을 주기적으로 깝니다. |
— | |
| Dutch | Stekeltapijt Legt regelmatig een tapijt van stekels over het hele pad. |
— | |
| Norwegian | Spikermatte Legger regelmessig en spikermatte over hele banen. |
— | |
| Polish | Kolczasty dywan Regularnie ścieli dywan z kolców na całej ścieżce. |
— | |
| Portuguese (Brazil) | Tapete de Espinhos Coloca regularmente um tapete de espinhos sobre toda a pista. |
— | |
| Russian | Колючий ковёр Регулярно покрывает всю трассу ковром из шипов. |
— | |
| Swedish | Spikmatta Lägger regelbundet ut en spikmatta över hela banan. |
— | |
| Thai | พรมตะปู วางพรมตะปูทั่วทั้งเส้นทางเป็นระยะ |
— | |
| Turkish | Çivi Halısı Düzenli olarak tüm parkura çivi halısı gönderir. |
— | |
| Chinese (simplified) | 刺钉地毯 周期性地在整条路径上设置一个刺钉地毯。 |
— | |
| Chinese (traditional) | 針刺地毯 定期在所有路徑上擺放針刺。 |
— | |
| This list was last updated for: version 43.1 | |||
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