Trinisphere [Darksteel] Naga Shaman Rishada is the gateway to

Rishada is the gateway to free trade—but the key will cost you

but you may put it on top of your library instead of into your graveyard

Caves of Koilos deals 1 damage to you

Set: Planechase Type: Enchantment Rarity: Rare Cost: {1}{B}{B}{B} Whenever a creature you control dies

Trinisphere [Darksteel] Naga Shaman Rishada is the gateway toSet: 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.)