Triplets of Nyx

Other creatures have bestow, and the creature enchanted gets it's abilities and +X/+Y Where x is the bestowing creatures power and y is it's toughness. Their bestow cost is their mana cost.
Constellation- Whenever an enchantment enters the battlefield, search your library for an enchantment card with less than or equal converted mana cost as the enchantment cast.
Never before have the gods of Theros been rivaled, until now.