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

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

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