Can I play a reaction in response to a when I defend trigger?
Yes, you can play a Reaction in response to a "When I defend" trigger.
According to RiftJudge FAQ #6106 and RiftJudge FAQ #8093, "When I defend" triggers are placed on the chain, and because reactions can be played in response to any trigger on the chain (or during any closed state), they are eligible targets for reaction-speed effects.
How the Timing Works
When a combat showdown begins, the sequence follows the Showdown Timing Flowchart and Rule 459.2.d:
- Trigger Placement:
- The attacker places all their "When I attack" triggers on the chain first.
- Any non-defender players (in turn order) place their triggers.
- The defender places all their "When I defend" triggers on the chain last.
- Locking Choices: You must choose all required targets for these triggers before any player is permitted to play a reaction (see RiftJudge FAQ #10000 and Rule 402.1).
- Reaction Window: Once all triggers are on the chain and all choices are made, the state becomes Closed. Players may then alternate playing reactions to the chain.
- Resolution: The chain resolves in LIFO (Last-In, First-Out) order. Because "When I defend" triggers are typically added to the chain last, they will resolve first.
Important Reminders:
- No Actions: You cannot play [ACTION] cards while there are items on the chain, including combat triggers. Only [REACTION] cards can be played (see RiftJudge FAQ #2281).
- Optional Triggers: If a trigger says "you may," the controller chooses whether to place it on the chain at all. If they choose not to, it cannot be reacted to because it never enters the chain.