Leyline of Transformation DSK/372

Set: Duskmourn: House of Horror
Collector Code: DSK/372
Name: Leyline of Transformation
Type: Enchantment
Oracle text: If this card is in your opening hand, you may begin the game with it on the battlefield. As this enchantment enters, choose a creature type. Creatures you control are the chosen type in addition to their other types. The same is true for creature spells you control and creature cards you own that aren't on the battlefield.
Rarity: Rare