Guilds of Ravnica

Bartizan Bats | Creature | Bat | Flying (This creature can't be blocked except by creatures with flying or reach.) | Nils Hamm

Moodmark Painter | Creature | Human Shaman | Undergrowth — When Moodmark Painter enters the battlefield, target creature gains menace and gets +X/+0 until end of turn, where X is the number of creature cards in your graveyard. (It can't be blocked except by two or more creatures.) | Scott Murphy

Undercity Necrolisk | Creature | Zombie Lizard | {1}, Sacrifice another creature: Put a +1/+1 counter on Undercity Necrolisk. It gains menace until end of turn. Activate only as a sorcery. (It can't be blocked except by two or more creatures.) | Tomasz Jedruszek

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

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