In a multiplayer game, if you cast a spell and two opponents both want to respond, who gets priority first?

When the active player (the one whose turn it is) passes priority after casting a spell, priority passes to the next player in turn order — that is, the player sitting to the active player's left in a typical clockwise game. This is governed by CR 117.3a, which states that the active player receives priority first at the beginning of each step and phase, and CR 117.3b, which explains that after that, priority passes in turn order among all players.

So if Player A is the active player and casts a spell, Player A first receives priority (and has already used it to cast the spell). Priority then passes to Player B (the next player clockwise), then Player C, and so on. Each player may respond, pass, or take actions before the next player gets the chance.

This means both opponents do get a chance to respond, but they do so sequentially in turn order — not simultaneously. A player cannot 'jump the queue'; you must wait until priority reaches you before you can act.

Concrete example: It's Player A's turn. They cast Lightning Bolt. Priority passes to Player B (left of A), who may counter it or respond. Only after Player B passes priority does Player C get to respond. If both pass in succession without acting, the spell resolves.

References: CR 117.3a establishes priority at the start of steps/phases, and CR 117.3b covers the clockwise passing of priority in multiplayer games.