Mox Opal [Double Masters] Sliver Eldrazi It leaps from tree to

It leaps from tree to tree

Set: Core Set 2021 Prerelease Promos Type: Enchantment Rarity: Mythic Cost: {3}{R}{R}{R} If a source you control would deal damage to a permanent or player

When that mana is spent to cast an instant or sorcery spell

Set: Foreign Black Border Type: Artifact Rarity: Uncommon Cost: {3} Basalt Monolith doesn't untap during your untap step

elder researcher

Mox Opal [Double Masters] Sliver Eldrazi It leaps from tree toSet: Double Masters 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.