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Assert Authority [Mirrodin]
| Set: | Mirrodin |
| Type: | Instant |
| Rarity: | Uncommon |
| Cost: | 5UU |
| Colors: | U |
Affinity for artifacts (This spell costs {1} less to cast for each artifact you control.)
Counter target spell. If that spell is countered this way, exile it instead of putting it into its owner's graveyard.
Counter target spell. If that spell is countered this way, exile it instead of putting it into its owner's graveyard.