The Nautic Siege Core can switch between being surfaced and being submerged. When surfaced, it attacks by rapidly firing homing rockets at Bloons within its range or within the range of other towers, which burst into smaller projectiles on impact, and it also automatically launches one powerful missile at each Bloon that enters the map. When submerged, it damages Bloons within its range with radioactive pulses and provides several buffs, especially to Heroes and other Monkey Subs. It has an Activated Ability that starts a 15-second countdown, after which it fires three powerful missiles that each deal heavy damage with an explosion, stun Bloons with an aftershock, and leave pools of radioactive fallout on the track that damage Bloons that pass over them.
The Nautic Siege Core's Monkey Special toggles it between being submerged and unsubmerged. When unsubmerged, it uses its cruise missile and pre-emptive missile attacks, and the player can change its targeting to First, Last, Close, or Strong. When submerged, it uses its reactor attack and provides multiple buffs to towers within its range, and the player cannot change its targeting. It is unsubmerged by default and toggling it has a 0.5-second cooldown. On desktop, the player can also toggle it with the Monkey Special hotkey.
Rocket attack
While unsubmerged, the Nautic Siege Core's attack rapidly fires homing rockets that burst into three non-homing rockets on impact with the first Bloon they hit. It is not affected by Quad Burst. Like Advanced Intel, the Nautic Siege Core can target Bloons that are within range of other towers in addition to itself. Although it has Camo detection, it cannot target Camo Bloons within range of towers that do not have Camo detection. Any projectiles it fires at Bloons within range of towers that lack Camo detection are unable to hit Camo Bloons.
Pre-emptive attack
While unsubmerged, each time a Bloon enters the map (including Camo Bloons), the Nautic Siege Core automatically launches a special missile at it, which has unlimited range and ignores line of sight blockers. It deals heavy damage, particularly to Boss Bloons and Ceramic Bloons (including Dreadbloon's Ceramic Armor Shell). Unlike Pre-emptive Strike, it can target non-MOAB-Class Bloons, its damage can soak through MOAB-Class Bloon layers, and each missile also generates an explosion that damages other Bloons near the target.
Pulse attack
While submerged, the Nautic Siege Core's attack rapidly emits radioactive pulses around it that damage all Bloons within its range and remove Camo and Regrow properties. Bloons hit by a pulse are irradiated for the same duration as its base attack cooldown, and its pulses cannot hit irradiated Bloons, which effectively prevents attack speed buffs and Degree-based attack speed modifiers from increasing its damage rate. (It can hit Bloons irradiated by Bloontonium Reactors and Energizer and vice versa, however.)
Buffs
While submerged, the Nautic Siege Core provides the following buffs:
Non-Paragon towers placed on water within its range have their Activated Ability cooldowns reduced by 30% (50% total).
Paragons within its range have their Activated Ability cooldowns reduced by 10%.
Heroes within its range gain ×6 damage (only damage dealt to all bloons, any extra damage exclusive to bloon types is unchanged), ×3 pierce, +30% attack cooldown (which reduces their attack speed by roughly 23%), and ×5 XP earned at the end of each round.
Other Monkey Subs within its range gain ×7 damage and ×3 pierce. The First Strike ability is not affected by this buff.
Final Strike
Final Strike is the Nautic Siege Core's Activated Ability. Upon activation, the Nautic Siege Core starts a 15-second countdown, during which all its other attacks are disabled (though it can still provide buffs and use its Monkey Special). The countdown pauses between rounds. 5 seconds into the countdown, it launches three missiles into the air, and when the countdown ends, the missiles strike their targets. One missile targets First, one targets Close, and one targets Strong, and it can target Camo Bloons. On impact, each missile generates an explosion that deals heavy damage, generates a larger "aftershock" explosion that deals damage and stuns all Bloons except BADs and Boss Bloons for 15 seconds, and leaves behind five pools of radioactive fallout on the track that rapidly damage Bloons that pass over it (similar to Wall of Fire). The fallout lasts for 36 seconds and does not disappear at the end of the round. It has a base cooldown of 240 seconds and starts with its full cooldown.
If there are no Bloons on-screen when the countdown ends, the ability pauses until a target becomes available. The ability does not start its cooldown or re-enable the Nautic Siege Core's other attacks until it has a target.
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
5-0-0
$367,245
$432,055
$466,615
$518,465
$257,072
$302,439
$326,631
$362,926
5-1-0
$367,625
$432,505
$467,100
$519,005
$257,338
$302,754
$326,970
$363,304
5-2-0
$367,880
$432,805
$467,425
$519,365
$257,516
$302,964
$327,198
$363,556
5-0-1
$367,625
$432,505
$467,100
$519,005
$257,338
$302,754
$326,970
$363,304
5-0-2
$368,475
$433,505
$468,180
$520,205
$257,933
$303,454
$327,726
$364,144
0-5-0
$377,755
$444,425
$479,980
$533,310
$264,429
$311,098
$335,986
$373,317
1-5-0
$377,865
$444,555
$480,120
$533,465
$264,506
$311,189
$336,084
$373,426
2-5-0
$378,290
$445,055
$480,660
$534,065
$264,803
$311,539
$336,462
$373,846
0-5-1
$378,135
$444,875
$480,465
$533,850
$264,695
$311,413
$336,326
$373,695
0-5-2
$378,985
$445,875
$481,545
$535,050
$265,290
$312,113
$337,082
$374,535
0-0-5
$365,815
$430,375
$464,805
$516,450
$256,071
$301,263
$325,364
$361,515
1-0-5
$365,925
$430,505
$464,945
$516,605
$256,148
$301,354
$325,462
$361,624
2-0-5
$366,350
$431,005
$465,485
$517,205
$256,445
$301,704
$325,840
$362,044
0-1-5
$366,195
$430,825
$465,290
$516,990
$256,337
$301,578
$325,703
$361,893
0-2-5
$366,450
$431,125
$465,615
$517,350
$256,515
$301,788
$325,931
$362,145
Cash investment
Source
Cost per power
Maximum
Easy
Medium
Hard
Impoppable
Easy
Medium
Hard
Impoppable
Tower sacrifices
$17
$20
$21.6
$24
$1,020,000
$1,200,000
$1,296,000
$1,440,000
Cash slider
$17.85
$21
$22.68
$25.2
$1,071,001
$1,260,001
$1,360,801
$1,512,001
Investment required per Degree (assuming no other power is provided)
Degree
Power
Tower sacrifices
Cash slider
Easy
Medium
Hard
Impoppable
Easy
Medium
Hard
Impoppable
2
2,000
$34,000
$40,000
$43,200
$48,000
$35,700
$42,000
$45,360
$50,400
3
2,324
$39,508
$46,480
$50,198.4
$55,776
$41,483.4
$48,804
$52,708.32
$58,564.8
4
2,666
$45,322
$53,320
$57,585.6
$63,984
$47,588.1
$55,986
$60,464.88
$67,183.2
5
3,027
$51,459
$60,540
$65,383.2
$72,648
$54,031.95
$63,567
$68,652.36
$76,280.4
6
3,408
$57,936
$68,160
$73,612.8
$81,792
$60,832.8
$71,568
$77,293.44
$85,881.6
7
3,808
$64,736
$76,160
$82,252.8
$91,392
$67,972.8
$79,968
$86,365.44
$95,961.6
8
4,228
$71,876
$84,560
$91,324.8
$101,472
$75,469.8
$88,788
$95,891.04
$106,545.6
9
4,669
$79,373
$93,380
$100,850.4
$112,056
$83,341.65
$98,049
$105,892.92
$117,658.8
10
5,131
$87,227
$102,620
$110,829.6
$123,144
$91,588.35
$107,751
$116,371.08
$129,301.2
11
5,615
$95,455
$112,300
$121,284
$134,760
$100,227.75
$117,915
$127,348.2
$141,498
12
6,121
$104,057
$122,420
$132,213.6
$146,904
$109,259.85
$128,541
$138,824.28
$154,249.2
13
6,650
$113,050
$133,000
$143,640
$159,600
$118,702.5
$139,650
$150,822
$167,580
14
7,203
$122,451
$144,060
$155,584.8
$172,872
$128,573.55
$151,263
$163,364.04
$181,515.6
15
7,779
$132,243
$155,580
$168,026.4
$186,696
$138,855.15
$163,359
$176,427.72
$196,030.8
16
8,379
$142,443
$167,580
$180,986.4
$201,096
$149,565.15
$175,959
$190,035.72
$211,150.8
17
9,004
$153,068
$180,080
$194,486.4
$216,096
$160,721.4
$189,084
$204,210.72
$226,900.8
18
9,654
$164,118
$193,080
$208,526.4
$231,696
$172,323.9
$202,734
$218,952.72
$243,280.8
19
10,330
$175,610
$206,600
$223,128
$247,920
$184,390.5
$216,930
$234,284.4
$260,316
20
11,032
$187,544
$220,640
$238,291.2
$264,768
$196,921.2
$231,672
$250,205.76
$278,006.4
21
11,761
$199,937
$235,220
$254,037.6
$282,264
$209,933.85
$246,981
$266,739.48
$296,377.2
22
12,518
$212,806
$250,360
$270,388.8
$300,432
$223,446.3
$262,878
$283,908.24
$315,453.6
23
13,302
$226,134
$266,040
$287,323.2
$319,248
$237,440.7
$279,342
$301,689.36
$335,210.4
24
14,114
$239,938
$282,280
$304,862.4
$338,736
$251,934.9
$296,394
$320,105.52
$355,672.8
25
14,955
$254,235
$299,100
$323,028
$358,920
$266,946.75
$314,055
$339,179.4
$376,866
26
15,825
$269,025
$316,500
$341,820
$379,800
$282,476.25
$332,325
$358,911
$398,790
27
16,725
$284,325
$334,500
$361,260
$401,400
$298,541.25
$351,225
$379,323
$421,470
28
17,655
$300,135
$353,100
$381,348
$423,720
$315,141.75
$370,755
$400,415.4
$444,906
29
18,616
$316,472
$372,320
$402,105.6
$446,784
$332,295.6
$390,936
$422,210.88
$469,123.2
30
19,609
$333,353
$392,180
$423,554.4
$470,616
$350,020.65
$411,789
$444,732.12
$494,146.8
31
20,633
$350,761
$412,660
$445,672.8
$495,192
$368,299.05
$433,293
$467,956.44
$519,951.6
32
21,689
$368,713
$433,780
$468,482.4
$520,536
$387,148.65
$455,469
$491,906.52
$546,562.8
33
22,778
$387,226
$455,560
$492,004.8
$546,672
$406,587.3
$478,338
$516,605.04
$574,005.6
34
23,900
$406,300
$478,000
$516,240
$573,600
$426,615
$501,900
$542,052
$602,280
35
25,056
$425,952
$501,120
$541,209.6
$601,344
$447,249.6
$526,176
$568,270.08
$631,411.2
36
26,246
$446,182
$524,920
$566,913.6
$629,904
$468,491.1
$551,166
$595,259.28
$661,399.2
37
27,471
$467,007
$549,420
$593,373.6
$659,304
$490,357.35
$576,891
$623,042.28
$692,269.2
38
28,732
$488,444
$574,640
$620,611.2
$689,568
$512,866.2
$603,372
$651,641.76
$724,046.4
39
30,028
$510,476
$600,560
$648,604.8
$720,672
$535,999.8
$630,588
$681,035.04
$756,705.6
40
31,360
$533,120
$627,200
$677,376
$752,640
$559,776
$658,560
$711,244.8
$790,272
41
32,729
$556,393
$654,580
$706,946.4
$785,496
$584,212.65
$687,309
$742,293.72
$824,770.8
42
34,135
$580,295
$682,700
$737,316
$819,240
$609,309.75
$716,835
$774,181.8
$860,202
43
35,579
$604,843
$711,580
$768,506.4
$853,896
$635,085.15
$747,159
$806,931.72
$896,590.8
44
37,061
$630,037
$741,220
$800,517.6
$889,464
$661,538.85
$778,281
$840,543.48
$933,937.2
45
38,582
$655,894
$771,640
$833,371.2
$925,968
$688,688.7
$810,222
$875,039.76
$972,266.4
46
40,143
$682,431
$802,860
$867,088.8
$963,432
$716,552.55
$843,003
$910,443.24
$1,011,603.6
47
41,743
$709,631
$834,860
$901,648.8
$1,001,832
$745,112.55
$876,603
$946,731.24
$1,051,923.6
48
43,383
$737,511
$867,660
$937,072.8
$1,041,192
$774,386.55
$911,043
$983,926.44
$1,093,251.6
49
45,064
$766,088
$901,280
$973,382.4
$1,081,536
$804,392.4
$946,344
$1,022,051.52
$1,135,612.8
50
46,786
$795,362
$935,720
$1,010,577.6
$1,122,864
$835,130.1
$982,506
$1,061,106.48
$1,179,007.2
51
48,550
$825,350
$971,000
$1,048,680
$1,165,200
$866,617.5
$1,019,550
$1,101,114
$1,223,460
52
50,356
$856,052
$1,007,120
$1,087,689.6
$1,208,544
$898,854.6
$1,057,476
$1,142,074.08
$1,268,971.2
53
52,205
$887,485
$1,044,100
$1,127,628
$1,252,920
$931,859.25
$1,096,305
$1,184,009.4
$1,315,566
54
54,098
$919,666
$1,081,960
$1,168,516.8
$1,298,352
$965,649.3
$1,136,058
$1,226,942.64
$1,363,269.6
55
56,034
$952,578
$1,120,680
$1,210,334.4
$1,344,816
$1,000,206.9
$1,176,714
$1,270,851.12
$1,412,056.8
56
58,014
$986,238
$1,160,280
$1,253,102.4
$1,392,336
$1,035,549.9
$1,218,294
$1,315,757.52
$1,461,952.8
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: What timer do you must set for the first Final Strike against a Boss? Is it 4 seconds to let the nuke hit the boss?
The Nautic Siege Core is a particularly versatile Paragon, due to its different modes that offer support or damage. In late Freeplay most of the time, keep it submerged for its buffs to heroes and other subs, and the ability cooldown reduction it gives to other Paragons, for example the Magus Perfectus's Arcane Metamorphosis. However, while not as strong as some other Paragons, when unsubmerged it deals heavy damage, especially to Bosses.
The Final Strike ability does massive damage, and can be used to allow hard rounds to be passed with much less difficulty than normal, though the really long cooldown prevents consistent use of the ability. Additionally, during the countdown, one should submerge the Nautic Siege Core, as while the countdown halts its attacks, it doesn't stop its buffs. Versus Bosses, time it very close to when the Boss would come on the upcoming round, but always account for the 3 second Boss arrival delay.
Outside of buying for the faster Paragon ability cooldowns, high degrees are mandatory for the Nautic Siege Core, as it greatly improves its damage and Final Strike's consistency.
For Boss Events, Nautic Siege Core's best matchup is Vortex if it is positioned away from Vortex's stun areas (if no water exists to avoid Vortex, use Lord of the Abyss's ink platform), taking advantage of its Advanced Intel and Final Strike to avoid most of its stuns, and its worst matchup is Lych because of the Lych-soul and resurrected DDTs. It's also effective against Phayze in the presence of innate camo detectors around the map to provide camo sight outside its base range.
Update history
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Given the long cooldown we want it to feel impactful in freeplay for longer, so all of the Nautic Siege Core’s ability boss damage is being converted to basic damage & bonuses to MOAB. — Update notes
”
Final Strike explosion: base damage increased ― 50000 → 60000
Final Strike explosion: no longer deals +10,000 bonus boss damage
Final Strike aftershock: base damage increased ― 10000 → 15000
Final Strike aftershock: no longer deals +5,000 boss damage
Sub Paragon unsubmerged form is overperforming, so we’re reducing the boss power of the main attack while greatly improving the less desirable submerged power. — Update notes
”
Main dart: damage to bosses reduced ― +300 → +200
Airburst dart: damage to bosses reduced ― +180 → +100
Pulse: cooldown reduced ― 0.425s → 0.28s
Pulse radiation: base damage increased ― 50 → 250
Pulse radiation: damage to bosses reduced ― +500 → +250
This article or section needs more screenshots. See the screenshot guidelines for more information on what screenshots are needed and how to add them. The editor that added this notice elaborates: Add screenshots of what the Nautic looks like at each degree. Also, add more GIFs of each of its attacks and animations
The bottom of the nautic siege core, revealed by selling a Lord of the Abyss as the Flooded Valley dam is flooding.
The bottom of the nautic siege core, submerged.
Pulse attack
Assets
Portrait
Upgrade/ability icon
Buff icon
Trivia
Its Final Strike ability has the longest cooldown of any given ability in BTD6, at 240 seconds.
The captain of the Nautic Siege Core has a golden tooth, similar to the Navarch of the Seas.
The bottom of the Nautic Siege Core does not change in appearance throughout degrees.
어마어마한 사정거리와 화력을 자랑하며 다른 원숭이 타워와 영웅들과의 시너지도 좋아 모든 풍선들에게 큰 위협이 됩니다.
—
Dutch
Met een onvoorstelbaar bereik, weergaloze kracht en ongeëvenaarde synergieën met andere Apentorens en Helden opent deze paragon de aanval op alle Bloons.
—
Norwegian
Uendelig rekkevidde, kraft og synergisme med andre apetårn og helter sørger for at alle bloonsene er under angrep.
—
Polish
Niezmierzony zasięg, moc i synergia z innymi małpimi wieżami i bohaterami stawiają wszystkie blony pod ostrzałem.
—
Portuguese (Brazil)
Alcance, poder e sinergias incomensuráveis com outras torres de macaco e heróis colocam os Bloons em maus lençóis.
—
Russian
Невообразимая дальность, мощь и синергия с другими башнями и героями. Шарам не поздоровится.
—
Swedish
Ofattbar räckvidd, kraft och synergier med andra Aptorn och Hjältar gör att ingen Bloon går säker.
Quad Burst. Like Advanced Intel, the Nautic Siege Core can target Bloons that are within range of other towers in addition to itself. Although it has Camo detection, it cannot target Camo Bloons within range of towers that do not have Camo detection. Any projectiles it fires at Bloons within range of towers that lack Camo detection are unable to hit Camo Bloons.
Submerge toggle now has a 1-second cooldown
Final Strike initial impact damage per missile increased ― 30,000 → 50,000
The bottom of the nautic siege core, revealed by selling a Lord of the Abyss as the Flooded Valley dam is flooding.
The bottom of the nautic siege core, submerged.
Pulse attack
Portrait
Upgrade/ability icon
Buff icon