At the beginning of your end step, put a pressure counter on Mount Keralia.
When you planeswalk away from Mount Keralia, it deals damage equal to the number of pressure counters on it to each creature and each planeswalker.
Whenever chaos ensues, prevent all damage that planes named Mount Keralia would deal this game to permanents you control.
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1 Jun 2012
If you roll {CHAOS}, Mount Keralia’s damage-prevention effect will last for the rest of the game. It will apply to damage dealt by any plane named Mount Keralia, regardless of who owns that plane.