this white enchantment doesnt stop your opponents from shuffling creatures around or anything
Creatures (3) Lands (37) Spells (20) Glittering Wish can find Swans of Bryn Argoll, sure, but it can also find Beck // Call, making it work with either of your three-mana enchantments
Gargos triggers only when a spell targets one of your creatures, so you cant run the Cauldron of Souls trick
Those two cards have been, at different times, key parts of the most powerful deck in their respective format
Because face-down creatures don't have a name, they can't have the same name as any other creature, even another face-down creature
With each reintroduction of the creature type, Wizards has reached deeper into the pool of keywords and mechanics for every Sliver [you control] to share