Vessel

{w}{u}{r}, {t}: Create X 1/1 colorless Follower tokens with “{b}, {t}, Sacrifice this token: Put a +1/+1 counter on target creature you control”, where X is Vessel’s power.

Sacrifice 3 Follower tokens: Search your library for a Song card, reveal it, put it into your hand, then shuffle.

Sacrifice 5 Follower tokens: Vessel can’t be blocked this turn.