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Gravelgill Duo [Shadowmoor]
| Set: | Shadowmoor |
| Type: | Creature — Merfolk Rogue Warrior |
| Cost: | {2}{U/B} |
Whenever you cast a blue spell, Gravelgill Duo gets +1/+1 until end of turn.
Whenever you cast a black spell, Gravelgill Duo gains fear until end of turn. (It can't be blocked except by artifact creatures and/or black creatures.)
