Trinisphere [Darksteel] Land // Legendary Creature Set: Arena League 2002 Type:

Set: Arena League 2002 Type: Creature — Jellyfish Rarity: Rare Cost: {2}{U} When Man-o'-War enters the battlefield

Spend this mana only to cast creature spells

Set: Theros Type: Legendary Enchantment Creature — God Rarity: Mythic Cost: {3}{R} Indestructible

If those permanents are exchanged this way

Trinisphere [Darksteel] Land // Legendary Creature Set: Arena League 2002 Type:Set: 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.)