Steam Vents [Guildpact] Aether Revolt remove all mire counters from

remove all mire counters from a land that a mire counter was put onto with Cyclopean Tomb but that a mire counter has not been removed from with Cyclopean Tomb

then sacrifice it unless you pay its upkeep cost for each age counter on it

When Ancestral Knowledge leaves the battlefield

Set: Limited Edition Beta Type: Land — Island Mountain Rarity: Rare ({T}: Add {U} or {R}

Set: Planechase Anthology Planes Type: Plane — Dominaria Common Cost: All creatures have "{T}: Add {G}{G}

Steam Vents [Guildpact] Aether Revolt remove all mire counters fromSet: Guildpact Type: Land Island Mountain Rarity: Rare ({T}: Add {U} or {R}.) As Steam Vents enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.