B.R.A.I.N.S.

The B.R.A.I.N.S, or Bad Radioactive Airship In a Noobish Shield, is an airship with a force field. The force field takes 1000 hits to destroy and spawns ceramics until destroyed. The airship only only takes 500 hits to destroy, but uses an ability after the force field is destroyed:

Zombify: Turns a random monkey into a zombie for the round, zombified monkeys get green hues, walk around, throw their darts, glaives, etc. at other towers to deal 3 HP damage, and turn other monkeys into zombies. Buildings and machines are unaffected. (This is my first ability! :D)

It spawns 5 Z.O.M.G.s, 30 Ceramic Bloons, and 50 Tiger Bloons.