For two mana (1C, 1R) you can give the card Haste and return it to your hand at the start of the next end step
5 Wardens Of The Cycle Death For Advantage Wardens of the Cycle rewards you for having a creature die by either gaining you a bit of life or getting you a card into your hand at the end step
Krark, the Thumbless leads to funny, coin-flippy games, at least until you bust out cards like Spark Double and a partner commander like Sakashima of a Thousand Faces to start breaking things
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More importantly, the creature card has a useful ability in that whenever it attacks or is targeted by an opponents spell, it can deal three damage to each opponent (making it potentially useful in multiplayer formats such as Commander) or exile (essentially remove from the game, in Magic: The Gatherings lingo) the top two cards of the players deck - the player then picks one of those two cards, which they can choose to play until the end of their next turn
Not to mention, Innistrad is a fan favorite plane due to incorporating Werewolves, Zombies, and Vampires which is sure to attract tribal-minded MTG players