Time Elemental {2}{U}
Creature — Elemental
When this creature attacks or blocks, at end of combat, sacrifice it and it deals 5 damage to you.
{2}{U}{U}, {T}: Return target permanent that isn't enchanted to its owner's hand.
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Cards that do something similar expected a card that isn't here?
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"When this creature attacks or blocks, sacrifice it at end of combat."
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"When this creature attacks or blocks, sacrifice it at end of combat."
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$0.32#30820
"Whenever this creature attacks or blocks, sacrifice it unless you exile a card from your graveyard."
Treacherous Vampire 83%
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"Whenever this creature attacks or blocks, sacrifice it unless you exile a card from your graveyard."
Mana-Charged Dragon 82%
$1.33#18393
"Whenever this creature attacks or blocks, each player starting with you may pay any amount of mana. This creature gets +X/+0 until end of turn, where X is the total amount of mana paid this way."
Wildwood Tracker 80%
$0.05#25084
"Whenever this creature attacks or blocks, if you control another non-Human creature, this creature gets +1/+1 until end of turn."