Cawl, the Many Enmeshed

When you cast Cawl, choose X targets from
among creatures and artifacts you control and creature and artifact cards in your graveyard.
Exile those targets.
Cawl has all abilities of cards exiled with it, and
its power is equal to the total power of creature
cards exiled with it.
At the beginning of your upkeep, shuffle a card
exiled with Cawl into your library.