T.A.U.

The T.A.U., or Terateravolt Astronomical Überblimp, is a crazy tough MOAB-class bloon. It has the coloration like that of a ZOMG with the body of a MOAB, and it (surprise!) uses electricity. It takes 1777 hits to pop, and it pops into four M.U.O.N.s, therefore giving it an RBE of 4677. Like its child and grandchild, it uses a single electric attack.

Attack
Its attack is the legendary Uber Discharge, which utterly destroys anything and everything, even nearby bloons. The only survivors are of its family. It only uses this once at 99% of the map when you're about to lose anyways. Otherwise, it passively uses M.U.O.N.'s attack, with 18 second intervals.