Not legal in Standard, Pioneer, Pauper, Alchemy, Standard Brawl, Pauper Commander, Premodern, Old School, Penny Dreadful
Notes & Rules Information
Mindbreak Trap's alternative cost condition checks whether an opponent cast three or more spells this turn, not whether those spells have resolved.
(2025-09-19)
If a spell is exiled, it's removed from the stack and thus will not resolve. The spell isn't countered; it just no longer exists. This works on spells that can't be countered.
(2025-09-19)
For Mindbreak Trap's alternative cost to apply, a single opponent must cast three or more spells. Three opponents each casting a single spell won't work, for example.
rather than pay this spell's mana cost.