Mox Opal [Modern Masters 2015] Born of the Gods Hero's Path put a -1/-1 counter on

put a -1/-1 counter on enchanted creature

Set: Premium Deck Series: Slivers Type: Legendary Creature — Sliver Mutant Rarity: Mythic Cost: {W}{U}{B}{R}{G} {3}: Search your library for a Sliver card

you worthless pile of spine

Set: Commander 2015 Type: Land Rarity: Rare Oran-Rief

You may spend white mana as though it were mana of any color

Mox Opal [Modern Masters 2015] Born of the Gods Hero's Path put a -1/-1 counter onSet: Modern Masters 2015 Type: Legendary Artifact Rarity: Mythic Cost: {0} Metalcraft {T}: Add one mana of any color. Activate this ability only if you control three or more artifacts. The suns of Mirrodin have shone upon perfection only once.