
When you planeswalk to Pompeii and at the beginning of your upkeep, put an eruption counter on it.
Whenever you roll a blank on the planar diedieA creature dies when it goes from the battlefield to a graveyard. Being exiled or returned to hand is not dying., scryscryLook at that many cards from the top of your library, then put any number on the bottom and the rest back on top in any order. 2. Then put an eruption counter on Pompeii.
When chaos ensues, Pompeii deals damage to each creature and each player equal to the number of eruption counters on Pompeii. Each player sacrifices a land of their choice. Then planeswalk.
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Read from the rules text. A card that enables a keyword makes or is the thing; a card that rewards it gets better when you have it. Two cards interact when one enables what the other rewards.