The controller of another player can’t make that player concede. A player may concede the game at any time, even if they are controlled by another player. See rule 104.3a.
February 2, 2024 · Murders at Karlov Manor
rule 723.6 not present in this release
April 14, 2023 · March of the Machine
If a Magic subgame (see rule 724) is restarted, the main game is unaffected. Main-game effects that refer to the winner or loser of the subgame now refer to the winner or loser of the restarted subgame.
November 18, 2022 · The Brothers’ War
rule 723.6 not present in this release
October 7, 2022 · Unfinity
If a Magic subgame (see rule 724) is restarted, the main game is unaffected. Main-game effects that refer to the winner or loser of the subgame now refer to the winner or loser of the restarted subgame.
June 10, 2022 · Commander Legends: Battle for Baldur’s Gate
A subgame can be created within a subgame. The existing subgame becomes the main game in relation to the new subgame.