Pentagram of the Ages {4}
Artifact
{4}, {T}: The next time a source of your choice would deal damage to you this turn, prevent that damage.
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Cards that do something similar expected a card that isn't here?
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Bone Mask 96%
$0.99#29762
"{2}, {T}: The next time a source of your choice would deal damage to you this turn, prevent that damage. Exile cards from the top of your library equal to the damage prevented this way."