Caldero de peste

Text:

Al comienzo de tu mantenimiento, pon un contador de peste sobre el Caldero de peste.: Pon un contador de peste sobre el Caldero de peste o remueve un contador de peste de él.Cuando el Caldero de peste tenga tres o más contadores de peste, sacrifícalo. Si lo haces, destruye todos los permanentes que no sean tierras.

Rulings:

• 10/1/2005 You choose whether to add or remove a counter when the second ability resolves. You can’t choose to remove a counter if there isn’t one there.
• 10/1/2005 If the third ability triggers, removing a counter in response won’t stop the effect. However, somehow removing Plague Boiler from the battlefield in response would stop the effect because then you wouldn’t be able to sacrifice Plague Boiler.
• 10/1/2005 The sacrifice is done on resolution of the triggered ability.