Caged Horrors

Trigger - An opponent's creature declare an
attack on you or planeswalker you control
Whenever you take damage from an opponents
creature, Caged Horrors gains a counter
{b}{b}, {t} - Remove all counters from Caged
Horrors. Create a 3/3 black Monster creature
token for each counter removed. If more than
10 were removed this way, create that many
5/5 black Horror creature tokens instead.