RAWR! The super duper giga mega ultra epic royal loyal driller miller heart-filler draconic necromantic evil demonic destructive undefeatable lord of forum games has gone mad and you MUST defeat him! Basically, this is a bit like Brainworks. Attack them any way you like, but don't specify the damage, ever.
THE BRAINSTORM currently has: 999,999,999,999,999,999,999,999,999,999,860/ 1 decillion hp
B = Boss TB = The Brainstorm Mb = Mini-boss M = Minion