Trinisphere [Darksteel] Kithkin Knight if that spell's mana cost

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

Set: Hour of Devastation Prerelease Promos Type: Creature — Horse Rarity: Mythic Cost: {3}{W}{W} Other Horses you control have indestructible

Set: Journey into Nyx Type: Creature — Human Wizard Rarity: Mythic Cost: {1}{U} Heroic — Whenever you cast a spell that targets Sage of Hours

{T}: Regenerate another target Vampire

Set: Ixalan Prerelease Promos Type: Legendary Enchantment // Legendary Land Rarity: Rare Cost: {2}{G} When Growing Rites of Itlimoc enters the battlefield

Trinisphere [Darksteel] Kithkin Knight if that spell's mana costSet: Darksteel Type: Artifact Rarity: Rare Cost: {3} As long as Trinisphere is untapped, each spell that would cost less than three mana to cast costs three mana to cast. (Additional mana in the cost may be paid with any color of mana or colorless mana. For example, a spell that would cost {1}{B} to cast costs {2}{B} to cast instead.)