As long as Grist, the Hunger Tide isn't on the battlefield, it's a 1/1 Insect creature in addition to its other types.
Create a 1/1 black and green Insect creature token, then mill (To mill a card, a player puts the top card of their library into their graveyard.) a card. If an Insect card was milled this way, put a loyalty counter on Grist and repeat this process.
You may sacrifice a creature. When you do, destroy target creature or planeswalker.
Each opponent loses life equal to the number of creature cards in your graveyard.
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