Ravnica Allegiance

Spawn of Mayhem | Creature | Demon | Spectacle {1}{B}{B} (You may cast this spell for its spectacle cost rather than its mana cost if an opponent lost life this turn.) Flying, trample At the beginning of your upkeep, Spawn of Mayhem deals 1 damage to each player. Then if you have 10 or less life, put a +1/+1 counter on Spawn of Mayhem. | Victor Adame Minguez

Kaya, Orzhov Usurper | Legendary Planeswalker | Kaya | +1: Exile up to two target cards from a single graveyard. You gain 2 life if at least one creature card was exiled this way. −1: Exile target nonland permanent with mana value 1 or less. −5: Kaya, Orzhov Usurper deals damage to target player equal to the number of cards that player owns in exile and you gain that much life. | Yongjae Choi

Seraph of the Scales | Creature | Angel | Flying {W}: Seraph of the Scales gains vigilance until end of turn. {B}: Seraph of the Scales gains deathtouch until end of turn. Afterlife 2 (When this creature dies, create two 1/1 white and black Spirit creature tokens with flying.) | Magali Villeneuve

Captive Audience | Enchantment | | Captive Audience enters the battlefield under the control of an opponent of your choice. At the beginning of your upkeep, choose one that hasn't been chosen — • Your life total becomes 4. • Discard your hand. • Each opponent creates five 2/2 black Zombie creature tokens. | Dmitry Burmak

Rakdos, the Showstopper | Legendary Creature | Demon | Flying, trample When Rakdos, the Showstopper enters the battlefield, flip a coin for each creature that isn't a Demon, Devil, or Imp. Destroy each creature whose coin comes up tails. | Viktor Titov