Mowu, Good Boy

Trample
When Mowu enters the battlefield, you may
search your library and graveyard for a card
named "Jiang, Friend to Doggos" and reveal it,
then put it into your hand and shuffle your
library.
He is the goodest boy. Give him a bit of magic, some
belly rubs, and a couple bad guys for a snack, and
he'll follow you to the ends of the world.