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

Golgari Findbroker | Creature | Elf Shaman | When Golgari Findbroker enters the battlefield, return target permanent card from your graveyard to your hand. | Bram Sels

Rhizome Lurcher | Creature | Fungus Zombie | Undergrowth — Rhizome Lurcher enters the battlefield with a number of +1/+1 counters on it equal to the number of creature cards in your graveyard. | Mathias Kollros

Undercity Uprising | Sorcery | | Creatures you control gain deathtouch until end of turn. Then target creature you control fights target creature you don't control. (Each deals damage equal to its power to the other.) | Magali Villeneuve

Vraska, Golgari Queen | Legendary Planeswalker | Vraska | +2: You may sacrifice another permanent. If you do, you gain 1 life and draw a card. −3: Destroy target nonland permanent with mana value 3 or less. −9: You get an emblem with "Whenever a creature you control deals combat damage to a player, that player loses the game." | Magali Villeneuve