Carpet of Spikes (BTD6)

For the upgrade in Bloons TD Battles 2, see Carpet of Spikes (Battles 2).

Carpet of Spikes

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

← Spike Storm

Mega Massive Munitions Factory →

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, which is not affected by cooldown reductions or attack speed buffs. The ordinary Spike Storm ability remains unchanged.

Additionally, all of its spikes deal much more damage and have +5 pierce, in addition to increased attack speed (0.49s attack cooldown) and range (50 instead of 34) for the main attack. Both the main and ability spikes deal 3 damage and +7 MOAB-class damage. Each spike pile has 10 pierce, 15 with 1-5-0 crosspath. Ability spikes last for 18-22 seconds (36-44 seconds with 0-5-1).

Stats

For a complete list of Spike Factory stats, see Stats:Spike Factory (BTD6).

This data was last updated for: version 55.1

Tower
Display range 50 units Footprint radius 8 units Targeting options Normal

Attack
Cooldown 0.525s Offset (X, Y, Z) 0, 0, 16.33 Targeting Depends on targeting option Targeting range 50 units Filters Cannot target Camo
Ignores blockers
Projectile Pierce 10 Damage 3 Damage to MOAB-Class +7 Damage type Sharp Lifespan 50s Radius 6 units Rehit interval 0.001s Ignores blockers

Ability
Cooldown 50s Lifespan 2s
Attack Copies of this attack 4 Cooldown 0.04s Offset (X, Y, Z) 0, 0, 0 Targeting Normal (track) Targeting range ∞ units Ignores blockers Can fire between rounds Projectile Pierce 10 Damage 3 Damage to MOAB-Class +7 Damage type Sharp Lifespan 18s–22s Persists between rounds 1 Radius 6 units Rehit interval 0.001s Ignores blockers

1-5-0

Attack
Projectile Pierce 10 → 15

Ability
Attack Projectile Pierce 10 → 15

2-5-0

Attack
Projectile Damage type Sharp → Normal

Ability
Attack Projectile Damage type Sharp → Normal

0-5-1

Tower
Display range 50 units → 58 units

Attack
Targeting range 50 units → 58 units
Projectile Lifespan 50s → 100s

Ability
Attack Projectile Lifespan 18s–22s → 36s–44s

0-5-2

Tower
Targeting options Close Smart Automatic Set Target

Start-of-round buff
Cooldown modifier ×0.25 Lifespan 3s

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	$45,090	$53,050	$57,295	$63,660	$31,563	$37,135	$40,107	$44,562
0-5-2	$45,430	$53,450	$57,725	$64,140	$31,801	$37,415	$40,408	$44,898

Strategy

This strategy section is empty or incomplete. See the strategy guidelines for more information on how to write strategy sections. The editor who added this notice elaborates: More summarisations in chimps, bosses, etc.

Carpet of Spikes is a solid T5 for its high widespread 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.

Carpet of Spikes is an effective choice against Lych and Phayze, as both Bosses lack high density bloons and tower stuns. It has a very strong synergy with Lord of the Abyss, which not only serves as cleanup, but also boosts its pierce, and in turn its DPS, substantially. Other T5's that clear bloon swarms can pair well with Carpet of Spikes, such as The Bloon Solver.

Top crosspath is optimal in most cases, but bottom crosspath with 0-5-2 is much better on maps with alternating lanes such as Erosion, Bazaar, or Muddy Puddles.

Update history

For a complete list of Spike Factory changes, see Update history:Spike Factory (BTD6).

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Version 4.0

•  Passive: Redesigned ― 1 activation at beginning of round, with unlimited timed lifespan for spikes → 1 free Spike Storm ability every 20 seconds

Version 7.0

•  Upgrade cost reduced ― $50,000 → $42,000
  •  Overall cost reduced by $9,500 (due to cost changes for previous tiers)

Version 8.0

•  Damage to MOAB-Class increased ― +4 → +5

Version 21.0

“

[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

”

•  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)

Version 22.0

“

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

”

•  Passive ability: Now saves cooldown when saving
•  Base projectile lifespan reduced ― 70s → 50s
  • Note: Long Reach lifespan remains at 100s

0-5-2

•  Spike Storm ability: Targets only active paths (e.g. Bloody Puddles)
•  Passive ability: Targets only active paths (e.g. Bloody Puddles)

Version 23.0

“

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

”

•  Upgrade cost reduced ― $42,000 → $40,000
•  Rate increased ― 0.99s → 0.98s

Version 24.0

0-5-2

•  Now correctly works on splitting tracks (bug fix)

Version 27.0

“

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

”

•  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.

Version 29.0

“

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

”

•  Ability: Spikes now carry over one round

0-5-2

•  Ability: Now benefits from Smart Spikes' speed buff

Version 31.0

“

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

”

•  Range increased ― 34 → 50
  • Note: May reduce concentration of spikes
•  Spikes: Damage increased ― 3 → 4
•  Attack cooldown reduced ― 0.98s → 0.33s

Version 32.2

0-5-2

•  Smart Spikes start of round buff no longer applies to Spike Storm (undocumented)

Version 35.0

“

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

”

•  Base attack MOAB-class bonus ― +4 → +5
•  Passive ability MOAB-class bonus ― +4 → +5
•  Ability MOAB-class bonus ― +4 → +5

Version 38.0

“

A flat pierce increase is added on to middle T5’s base attack to reduce crosspath dependency & improve r100 strength.
— Update notes

”

•  All attacks: Pierce increased ― 5 → 10
  • Note: Affects both the main attack and the ability's spike piles

Version 39.0

“

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

”

•  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)

Version 40.0

“

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

”

•  Bonus MOAB damage reduced ― +9 → +8
•  Main attack damage reduced ― 4 → 3

Version 41.0

“

Middle spactory buffs were a fair amount overdone, cutting back more on this.
— Update notes

”

•  Bonus MOAB-class damage reduced ― +8 → +7
•  Spike Storm ability cooldown increased ― 40s → 45s

Version 43.0

“

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

”

•  Upgrade cost increased ― $40,000 → $42,000
•  Ability: Ability cooldown increased ― 45s → 50s

0-5-1, 0-5-2

•  Ability: Long Reach duration bonus for spikes increased ― 50% → 100%
  • Note: x-4-x spike duration changed from 15s-16.5s to 18s-22s

Version 44.0

“

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

”

•  Overall cost increased by $1,000 (due to cost changes for previous tiers)

Version 46.0

“

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

”

•  Spike Storm ability: Duration increased ― 1s → 2s
•  Spike Storm ability: Attack cooldown increased ― 0.02s → 0.04s

Version 48.0

“

Spike Storm’s price is being increased with Carpet of Spikes remaining the same total cost, [...]
— Update notes

”

•  Upgrade cost reduced ― $42,000 → $41,000
  •  Overall cost is unchanged (due to cost changes for previous tiers)

Version 53.0

“

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

”

•  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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Assets

• 
  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