Plague Boiler

Artifact

At the beginning of your upkeep, put a plague counter on this artifact.
{1}{B}{G}: Put a plague counter on this artifact or remove a plague counter from it.
When this artifact has three or more plague counters on it, sacrifice it. If you do, destroy all nonland permanents.

Illustrated by Mark Tedin

Ravnica: City of Guilds (RAV)

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