Guilds of Ravnica

Artful Takedown | Instant | | Choose one or both — • Tap target creature. • Target creature gets -2/-4 until end of turn. | Mike Bierek

Etrata, the Silencer | Legendary Creature | Vampire Assassin | Etrata, the Silencer can't be blocked. Whenever Etrata deals combat damage to a player, exile target creature that player controls and put a hit counter on that card. That player loses the game if they own three or more exiled cards with hit counters on them. Etrata's owner shuffles Etrata into their library. | Bastien L. Deharme

Nightveil Predator | Creature | Vampire | Flying, deathtouch Hexproof (This creature can't be the target of spells or abilities your opponents control.) | Darek Zabrocki

Connive | Sorcery | | Gain control of target creature with power 2 or less. | Dan Scott