Terror Tide
Sorcery (CMC 4)
Fathomless descent -- All creatures get -X/-X until end of turn, where X is the number of permanent cards in your graveyard.
Decks with Terror Tide
[LCI] Lost Caverns of Ixalan #127 (R)
[LCI] Lost Caverns of Ixalan #372 (R)
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[PLCI] The Lost Caverns of Ixalan Promos #127p (R)
[PLCI] The Lost Caverns of Ixalan Promos #127s (R)