Daltor The Terrible

Trample Hexproof
Daltor The Terrible comes into play with {x} +1/+1 counters on it.
Remove 3 +1/+1 counters from Daltor: Proliferate.
Whenever a player casts a spell you may remove {x} +1/+1 counters from Daltor, if {x} is equal to that spells Mana Value and if you do counter it and put twice that many +1/+1 counters on Daltor. Activate only once each turn.