Obsidian Charmaw [Modern Horizons 2 Prerelease Promos] SWSH039 if that spell's mana cost

if that spell's mana cost is {3}{U}{U}

Set: EX: Power Keepers Type: Psychic Rarity: Common Retreat cost: Colorless

Set: HeartGold & SoulSilver: Call of Legends Type: Psychic Rarity: Holo Rare Retreat cost: Colorless

with the next in line being Hulk

but unfortunately

Obsidian Charmaw [Modern Horizons 2 Prerelease Promos] SWSH039 if that spell's mana costSet: Modern Horizons 2 Prerelease Promos Type: Creature Dragon Rarity: Rare Cost: {3}{R}{R} This spell costs {1} less to cast for each land your opponents control that could produce {C}. Flying When Obsidian Charmaw enters the battlefield, destroy target nonbasic land an opponent controls.