Duskmourn: House of Horror

Clammy Prowler | Enchantment Creature | Horror | Whenever Clammy Prowler attacks, another target attacking creature can't be blocked this turn. | John Tedrick

Enduring Curiosity | Enchantment Creature | Cat Glimmer | Flash Whenever a creature you control deals combat damage to a player, draw a card. When Enduring Curiosity dies, if it was a creature, return it to the battlefield under its owner's control. It's an enchantment. (It's not a creature.) | Julie Dillon

Leyline of Transformation | Enchantment | | If Leyline of Transformation is in your opening hand, you may begin the game with it on the battlefield. As Leyline of Transformation 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. | Sergey Glushakov

Leyline of Mutation | Enchantment | | If Leyline of Mutation is in your opening hand, you may begin the game with it on the battlefield. You may pay {W}{U}{B}{R}{G} rather than pay the mana cost for spells that you cast. | Sergey Glushakov