OPPORTUNITY FIRE and INTERRUPT bought a moment the client would not
honor: every selection and targeting gate asked "is it your turn?",
and mid-interruption it is not — so the window's holder could click
attack cards into silence while the engine sat ready to accept the
cast. A window is now yourMoment: hand selection, player/creature/
cell/edge targeting, and the dimming aid all open exactly as on your
own turn, and the slip says what to do with it ("pick an attack card
and a target") instead of the cryptic "cast now".
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>