Artista: Larry Elmore

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Seafloor Debris enters the battlefield tapped.
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, Sacrifice Seafloor Debris: Add one mana of any color.

Vigilance
Threshold — As long as seven or more cards are in your graveyard, Mystic Penitent gets +1/+1 and has flying.

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Seafloor Debris enters the battlefield tapped.
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, Sacrifice Seafloor Debris: Add one mana of any color.

Flying
Threshold — As long as seven or more cards are in your graveyard, Childhood Horror gets +2/+2 and can’t block.

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You and target opponent each flip a coin. Mana Clash deals 1 damage to each player whose coin comes up tails. Repeat this process until both players’ coins come up heads on the same flip.

Enchant creature
All creatures able to block enchanted creature do so.

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: Target red or white creature gains trample until end of turn. (It can deal excess combat damage to the player or planeswalker it’s attacking.)

, : Thornscape Master deals 2 damage to target creature.
, : Target creature gains protection from the color of your choice until end of turn.