Plague Boiler

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.

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.

At the beginning of your upkeep, put a plague counter on Plague Boiler.
{1BG}: 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.