Summary Dismissal

Exile all other spells and counter all abilities.

Innistrad Remastered

Modern Horizons 3 Commander

Shadows over Innistrad Remastered

Eldritch Moon Promos

Only activated and triggered abilities on the stack are countered. Static abilities of objects remain unaffected, and activated and triggered abilities of objects may be activated or may trigger again later in the turn. Spells and abilities that have already resolved aren’t affected.

Spells that can’t be countered are exiled by Summary Dismissal. They won’t resolve.