Zo'kaash, Sultai Fanatic

Exploit (When this creature enters the battlefield, you
may sacrifice a creature.)
When Zo'kaash, Sultai Fanatic exploits a creature,
you may search your library for a Naga card,
reveal it, and put it into your hand. Then shuffle
your library. If you don't, put a 1/1 blue Naga
Spirit creature token onto the battlefield instead.
Partner (You can have two commanders if both have partner.)