Plague Boiler

Artifact, 3 (3)
At the beginning of your upkeep, put a plague counter on Plague Boiler.
{1}{B}{G}: Put a plague counter on Plague Boiler or remove a plague counter from it.
When Plague Boiler has three or more plague counters on it, sacrifice it. If you do, destroy all nonland permanents.
Illus. Mark Tedin

Format Legality	Legal in Vintage, Legacy, Extended Banned in Standard
Printings (1/9)	Ravnica: City of Guilds (Rare)