text: Semblance Anvil can reduce the amount you pay for a spell's cost that includes {X}. For example, Blaze is a sorcery that costs {X}{R}. If the card exiled with Semblance Anvil is a sorcery, and you want to cast Blaze with X equal to 5, you'll have to pay only {3}{R}. This is true even if the ability states that {X} must be paid with a certain color of mana (as Drain Life does).