C.A.E.S.I.U.M.

The C.A.E.S.I.U.M., or Clearly Abominable Envisioned Superior Isometric Uber Mondoblimp, is the second strongest bloon in the Alkali Series. At a purely massive 7500 layers, this thing won't go down without a fight. However, all that bulk comes with a drawback; it only moves at a speed of 0.2 relative to the Red Bloon, making it faster than the ZOMG by a measely factor of 1 and a ninth. It contains 4 R.U.B.I.D.I.U.M.s, giving it a crazy RBE of 54220. When popped over water, this bloon causes a destructive explosion that deals 20 damage to all towers in a radius 5% larger than a 0-1 Tack Shooter.