Ghost pirates

Ghost pirates is the round 425 Boss. It moves at 1/7 the speed of a red bloon, has 120,000 HP, and contains 500 Ghost Bloon (IBT's Conception)s.

It has some skills:

Undead gloom (passive): All towers attack half as fast, and if they are happy-based, they attack 1/3 as fast.

Wind rush: makes the wind blow hard. For 5 seconds, moves at the speed of a green bloon.

Skully skill: Shoots its skull at the nearest tower, dealing 15 damage and 10 splash damage, and anything in the raidius takes 1 damadge per second for the next 10 seconds. 10 seconds later, the skull regens due to nano-technolegy.

Energy katana: Shoots katanas at 2 towers that do 20 damage. 5 seconds later, they regen just like the skull.

Curse: Curses a tower, lowering its speed by 75% for 10 seconds.

Last stand: When almost dead, makes the war zone stormy, regens ALL hp, keeps how far he is in the track.

True final?: When that is almost dead, the skull explodes, revealing.. The beast has 100,000 HP, moves at 1/5 the speed of a red bloon, and keeps skully skill, undead gloom, energy katana, and curse. Also, some new skills:

Scare: scares a tower, rendering it unable to attack for 15 seconds.

Whip tail: any tower that touches its tail will take 3 damage.

Dark bombardment: Attacks a tower, dealing 30 splash damage, but sacrifices 5,000 HP.