The Search Begins

Whenever a creature you control attacks and is
blocked, place your choice of a +1/+1 counter, -1/-1
counter, on stun counter on The Search Begins.
Whenever a creature you control attacks and isn't
blocked, sacrifice The Search Begins.
When The Search Begins leaves the battlefield,
distribute all counters on it amongst any number of
creatures.

"I'll find you."
-Terrus