Can Fathomless Mud of the Swamp target the origin land of Spreading and Dreadful Mire, or does that fail because moving Presence is required?
Can Fathomless Mud of the Swamp target the origin land of Spreading and Dreadful Mire, or does that fail because moving Presence is required?
Yes, you can target the origin land: “this is required” is a reminder that if it’s possible to Move a Presence, you must, not that you must choose a target where moving Presence is possible.
(Also, while it's rarely relevant, you can technically Move a piece from a land to that same land, so long as the wording of the Power doesn't exclude doing so. Thematically, it’s moving within that land.)