Yasi, Time Devourer

Devoid (This card has no color)
Flying
Whenever Yasi blocks a creature, target
opponent reveals their hand only to you. You
pick a card from their hand, that player discards
that card, then, you search the player's library
for cards with the same name as that card and
put them into the player's graveyard, then, that
player shuffles their library.