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.
Near Mint - £0.40
Lightly Played - £0.30
Moderately Played - £0.30
Heavily Played - £0.20
Damaged - £0.10
Near Mint Non English - £0.40
Lightly Played Non English - £0.30
Moderately Played Non English - £0.30
Heavily Played Non English - £0.20
Damaged Non English - £0.10