K.E.F.K.A.

The K.E.F.K.A. (Killing Evil Fearful Killer Annihilator) is another powerful blimp, created by the megalomaniacal Apopalypse Bloon. It resembles a B.A.D. bloon, but it is colored blood red. It moves faster than the T.H.A.N.O.S., but slower than the P.A.L.A.D.I.N. K.I.M. (it moves at 1/6 of the P.A.L.A.D.I.N. K.I.M.'s speed). But it also has the traits of the P.A.L.A.D.I.N. K.I.M. and T.H.A.N.O.S. (both are immune to harnessed 0-0 Dart Monkeys.) It has 150,000 HP, but it also has 4 Auracrysts, making it even stronger than the T.H.A.N.O.S.! (It has 210,000 HP in total.) With powerful abilities, it is truly a threat! Upon death, it releases 4 T.H.A.N.O.S.s! It first spawns on Round 250, with it appearing every 250 rounds after that.

Abilities
Fireball Barrage: Shoots powerful fireballs at towers, draining 30 HP from them and stunning them for 5 seconds. (Cooldown: 30 seconds)

Blizzard of Doom: Uses an Absolute Zero-like ability, making your towers attack slower for 15 seconds. (Cooldown: 30 seconds)

Lightning Bolts of Death: Shoots 5 powerful lightning bolts at 5 random towers, killing them. Fortunately, these do not chain. (Cooldown: 25 seconds)

Blind: Blinds your towers, making them unable to attack for 15 seconds. (Cooldown: 30 seconds)

Drain: Drains your towers' HP to replenish its own. (Every 1 HP drained from your towers, it regains 100 HP!)

Meteor Storm: Rains down meteors from the sky for 15 seconds. If they hit your towers, they do 50 HP damage! (Cooldown: 1 minute)

Light of Judgment: Its deadliest ability yet. Shoots a yellow-colored Bloonsday Device-like orbital laser from the sky that lasts for 30 seconds. It can move it around quickly, thus potentially resulting in the deaths of many towers! And the worst part? The Light of Judgment instantly kills every tower it touches. But it very rarely, if ever, uses this ability. (Cooldown: 2 minutes)

Trivia
This blimp is obviously a reference to the main villain of Final Fantasy VI, and even has similar powers as Kefka himself.

When you start Round 250 or any other round the K.E.F.K.A. spawns in, you will hear 3 Kefka laughs (as heard here: https://www.youtube.com/watch?v=CyZoe-r9qb0). This signifies the arrival of the K.E.F.K.A..