If a player concedes in a multiplayer game do spells they control on the stack get exiled?

When a player concedes or is otherwise eliminated from a multiplayer game, they immediately leave the game. As part of that process, all objects that player owns or controls are removed. Specifically, any spells or abilities they control on the stack cease to exist — they are exiled. This is covered under CR 800.4a and 800.4h.

CR 800.4a states that when a player leaves the game, all objects that player owns leave the game as well. CR 800.4h further clarifies that if a player who controlled a spell or ability on the stack leaves the game, that spell or ability is removed from the stack and the effect does not resolve — it is simply exiled (removed from the game).

This means any spells the conceding player had cast but that hadn't resolved yet simply vanish. Opponents do not get a chance to respond to the removal of those spells; it all happens simultaneously as part of the concession process.

Concrete example: Alice casts Fireball targeting Bob in a three-player game. Before it resolves, Alice concedes. The Fireball is immediately exiled from the stack — it never resolves, and Bob takes no damage from it.

Note: If someone else controls a spell that Alice owns (e.g., via a copy or theft effect), the ownership vs. control distinction matters. Alice's own spells she controls leave; spells she owns but another player controls stay on the stack under that other player's control.