Ashnod's Altar [Antiquities] Human Spellshaper when an opponent's monster declares

when an opponent's monster declares an attack: You can change 1 face-down Defense Position "Subterror" monster you control to face-up Attack or Defense Position

Set: Alpha Edition Type: Basic Land — Mountain Rarity: Common ({T}: Add {R}

Special Summon that target

Set: Commander 2017 Type: Legendary Creature — Dragon Avatar Rarity: Mythic Cost: {4}{W}{U}{B}{R}{G} Eminence — As long as The Ur-Dragon is in the command zone or on the battlefield

You can only use this effect of "Darkness Metal

Ashnod's Altar [Antiquities] Human Spellshaper when an opponent's monster declaresSet: Antiquities Type: Artifact Rarity: Uncommon Cost: {3} Sacrifice a creature: Add {C}{C}.