Time Eater

Haste
Protection from Instants.
When an opponent casts a spell, put a Time Counter on Time Eater.
When Time Eater has 12 Time Counters, end
the current player's turn and remove all Time Counters on Time Eater, give Time Eater +2/0.
{t} Tap target creature, put a Time Counter
on Time Eater.