Cyclopean Tomb

{4}

Artifact

{2}, {T}: Put a mire counter on target non-Swamp land. That land is a Swamp as long as it has a mire counter on it. Play this ability only during your upkeep.

When Cyclopean Tomb is put into a graveyard from play, at the beginning of each of your upkeeps until the end of the game, remove a mire counter from a land that a mire counter was put onto with Cyclopean Tomb.