Mox Opal [Judge Gift Cards 2019] Xros Encounter Set: EX: Unseen Forces Type:

Set: EX: Unseen Forces Type: Lightning Rarity: Ultra Rare Retreat cost: Colorless

Set: Secret Lair Drop Series Type: Legendary Creature — Fungus Rarity: Rare Cost: {1}{B}{G} Whenever a Saproling you control dies

Set: Streets of New Capenna Prerelease Promos Type: Creature — Nightmare Angel Rarity: Mythic Cost: {3}{B}{B} Flying

or if it's just a special card for MagicCon Philadelphia

their majestic wings serve to circulate cool air through the vast hive chambers

Mox Opal [Judge Gift Cards 2019] Xros Encounter Set: EX: Unseen Forces Type:Set: Judge Gift Cards 2019 Type: Legendary Artifact Rarity: Mythic Cost: {0} Metalcraft {T}: Add one mana of any color. Activate only if you control three or more artifacts. The suns of Mirrodin have shone upon perfection only once.