Memory Tracer

Dredge 3
Memory Tracer enters the battlefield tapped.
{t}, Sacrifice Memory Tracer: Scry 3.
Channel —{2}{u}{b}, Exile two cards
from your graveyard: Return target instant or
sorcery card from your graveyard to your hand.
Channel —{2}{b}{g}, Exile two cards
from your graveyard: Return target permanent
card from your graveyard to your hand.