All permanents on the battlefield. Utopia Vow attached to Emmara. Emmara does not have summoning sickness.
All permanents on the battlefield. Horseshoe Crab does not have summoning sickness. Utopia Vow enchanting Horseshoe Crab.
All permanents on the battlefield. Warchanter Skald is not summoning sick. Warchanter Skald enchanted with Utopia Vow.