Imperitos Crown

Indestrucible.
Whenever a creature enters the battlefield
under your control, you may tap Imperitos
Crown. If you do, put a +1/+1 counter on all
creatures you control until end of turn.
{2}{w}{r}, {t}: Search your library for a creature
card with "Imperitos" in its name, reveal it, and
put it into your hand. Then shuffle your library.