Seat of the Synod [Planechase] Nightmare Horror you may search your library

you may search your library for an artifact creature card

Set: Unlimited Edition Type: Basic Land — Mountain Rarity: Common ({T}: Add {R}

Set: Magic 2013 Type: Creature — Avatar Rarity: Mythic Cost: {4}{W}{W}{W} Serra Avatar's power and toughness are each equal to your life total

Set: Eighth Edition Type: Creature — Elemental Rarity: Common Cost: {3}{R} Haste (This creature can attack and {T} as soon as it comes under your control

They adhere to order

Seat of the Synod [Planechase] Nightmare Horror you may search your librarySet: Planechase Type: Artifact Land Rarity: Common (Seat of the Synod isn't a spell.) {T}: Add {U}. Lumengrid, site of the Knowledge Pool, source of vedalken arcana.