In the case of Grafdiggers Cage, creatures you steal and then sacrifice just wont come back to play
She will use an ability called Aeriel Blast, which will cause unavoidable damage (mitigated somewhat by how much stone remains), and healers must be prepared to land a big group heal to quickly recover from the damage
While the effect does seem good, this card may see you waste a lot of cards that would have come naturally to your hand in Magic: The Gathering

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This gives him tremendous flexibility to meet different challenges any given scenario can present
What gives you the right