Rule 344.2
If Control of a Battlefield is Contested, there aren’t units controlled by different players there, and the turn is in a Neutral Open State, a Showdown is opened during the next Cleanup. See rule 318. Cleanups for more information.
Loading Arbiter…
If Control of a Battlefield is Contested, there aren’t units controlled by different players there, and the turn is in a Neutral Open State, a Showdown is opened during the next Cleanup. See rule 318. Cleanups for more information.