All permanents on the battlefield.
Seat of the Synod exiled by Prototype Portal's imprint ability. All other permanents on the battlefield.
Seat of the Synod in your graveyard. All other permanents on the battlefield. Goblin Welder does not have summoning sickness.
All permanents on the battlefield. Master Transmuter does not have summoning sickness.
All permanents on the battlefield. Master Transmuter is not summoning sick.
Sculpting Steel in hand. All other permanents on the battlefield. available.