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'Whenever this creature attacks, exile target card from an opponent's graveyard.
Flash Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.) When this creature...
'You may exile a black card with mana value X from your hand rather than pay this spell's mana cost.
Target creature gets -X/-X until end of turn.
'You may exile a green card with mana value X from your hand rather than pay this spell's mana cost.
You gain X life.
'You may exile a red card with mana value X from your hand rather than pay this spell's mana cost.
Target creature gets +X/+0 until end of turn.
As an additional cost to cast this spell, behold a Merfolk and exile it. (Exile a Merfolk you control or a Merfolk card from your hand.) Whenever this creature enters...
Flying
When this creature enters, destroy up to one target artifact or enchantment.
'You may exile a green card with mana value X from your hand rather than pay this spell's mana cost.
You gain X life.
'You may exile a red card with mana value X from your hand rather than pay this spell's mana cost.
Target creature gets +X/+0 until end of turn.
As an additional cost to cast this spell, behold a Merfolk and exile it. (Exile a Merfolk you control or a Merfolk card from your hand.) Whenever this creature enters...