Elsava, Epistemagician

Flash, flying
When Elsava, Epistemagician enters the battlefield
or deals combat damage to a player, reveal the top
five cards of your library. An opponent separates
those cards into two piles. Put one pile into your
hand and the other into your graveyard.
Unearth {1}{w}{u}{b} ({1}{w}{u}{b}: Return this card
from your graveyard to the battlefield. It gains haste.
Exile it at the beginning of the end step or if it would
leave the battlefield. Unearth only as a sorcery.)