mtg battle cry cards Similar to it gets +0/+1 until end of turn. Magic the Gathering [187] Theros:

Whenever equipped creature deals combat damage to a player, this Equipment deals damage to that player equal to the number of cards in their hand and you gain 1 life for each card in your hand

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Of course, it's not legal anywhere, though it works completely within black-border rules, so maybe a Rule 0 conversation can get you there

You can cast spells after that ability resolves but before you have to sacrifice the creature

The final upgrade of the card uses black mana

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