Trinisphere [Darksteel] PSA 9 If they do

If they do

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

Set: Kaladesh Promos Type: Artifact Creature — Construct Mythic Cost: {4}{B}{B} Menace When Noxious Gearhulk enters the battlefield

Set: Mirrodin Besieged Type: Artifact — Equipment Mythic Cost: {3} Equipped creature gets +2/+2 and has protection from black and from green

Set: Revised Edition Type: Land — Mountain Plains Rare Cost: ({T}: Add {R} or {W}

Trinisphere [Darksteel] PSA 9 If they doSet: Darksteel Type: Artifact 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.)