Thelon's Chant [Fallen Empires]

Set: Fallen Empires Type: Enchantment Uncommon Cost: {1}{G}{G} At the beginning of your upkeep, sacrifice Thelon's Chant unless you pay {G}. Whenever a player puts a Swamp onto the battlefield, Thelon's Chant deals 3 damage to that player unless the player puts a -1/-1 counter on a creature they control.