Grip of Amnesia
Instant
Counter target spell unless its controller exiles all cards from their graveyard.
Draw a card.
Legalities
- brawl: banned
- commander: legal
- legacy: legal
- modern: legal
- pauper: legal
- pioneer: banned
- standard: banned
- vintage: legal
Rulings
- 2004-10-04:
You can choose to exile all cards from your graveyard even if it has no cards in it.