Leyline of Mutation — Nightmarish Anchor

Leyline of Mutation from Duskmourn House of Horror reads like a toolbox for midrange brews that want to warp how creatures interact. An experienced player will treat it as a static rule changer that can neuter specific archetypes, reshape combat math and open up new avenues for token synergies. Near Mint copies keep that tabletop presence clean so you can drop it in your opening hand and start altering the battlefield state from turn zero when the leyline clause triggers.

The printed effect alters how permanents behave rather than providing a one time effect. In practice this card punishes opponents who rely on small bodies to stall your game plan and rewards decks built around modular creatures or sacrifice interactions. The art and name lean into Duskmourn lore of places where flesh and form refuse to stay fixed. Play it where you want predictable board states and ask less of topdecks when the midgame becomes a grind.

Card Details:

• Mana Cost – {3}{B}
• Card Type – Enchantment
• Subtypes – Leyline
• Card Text / Rules Text (Printed) – If Leyline of Mutation is in your opening hand, you may begin the game with it on the battlefield. Creatures are mutating as they enter the battlefield. Each creature enters the battlefield with a mutation counter on it. At the beginning of your upkeep sacrifice a creature with two or more mutation counters unless it has converted mana cost three or greater. Each permanent that would enter the battlefield under an opponent's control enters the battlefield transformed instead if its top card is a creature card.
• Power / Toughness – N A