Innistrad: Crimson Vow

Persistent Specimen | Creature | Skeleton | {2}{B}: Return Persistent Specimen from your graveyard to the battlefield tapped. | Scott Murphy

Undying Malice | Instant | | Until end of turn, target creature gains "When this creature dies, return it to the battlefield tapped under its owner's control with a +1/+1 counter on it." | Igor Kieryluk

Gift of Fangs | Enchantment | Aura | Enchant creature Enchanted creature gets +2/+2 as long as it's a Vampire. Otherwise, it gets -2/-2. | Dominik Mayer

Blood Fountain | Artifact | | When Blood Fountain enters the battlefield, create a Blood token. (It's an artifact with "{1}, {T}, Discard a card, Sacrifice this artifact: Draw a card.") {3}{B}, {T}, Sacrifice Blood Fountain: Return up to two target creature cards from your graveyard to your hand. | Evyn Fong