Silent Arbiter [Conspiracy] Swamp Forest Whenever the chosen player casts

Whenever the chosen player casts a spell

Set: Beta Edition Type: Artifact Rarity: Rare Cost: {3} {1}: The next time an unblocked creature of your choice would deal combat damage to you this turn

Set: Fallen Empires Type: Creature — Merfolk Rarity: Rare Cost: {U}{U} {U}: River Merfolk gains mountainwalk until end of turn

Set: Commander 2017 Type: Enchantment Rarity: Mythic Cost: {3}{G}{W} Creatures you control get +1/+1

Silent Arbiter [Conspiracy] Swamp Forest Whenever the chosen player castsSet: Conspiracy Type: Artifact Creature Construct Rarity: Rare Cost: {4} No more than one creature can attack each combat. No more than one creature can block each combat. Scholars say that arbiters exist on every world, created by an unknown hand to enforce justice.