GUARDIAN

Annihilator 6, indestructible.
When GUARDIAN enters the battlefield,
you may sacrifice up to 2 permanents.
All creatures you control get +X/+X, where X is
the number of permanents in your graveyard
and/or exile.
When GUARDIAN is put into a graveyard from
anywhere, its owner shuffles their graveyard into
their library and puts it in their hand.