Ravnica Allegiance

Angel of Grace | Creature | Angel | Flash Flying When Angel of Grace enters the battlefield, until end of turn, damage that would reduce your life total to less than 1 reduces it to 1 instead. {4}{W}{W}, Exile Angel of Grace from your graveyard: Your life total becomes 10. | Ryan Yee

Mesmerizing Benthid | Creature | Octopus | When Mesmerizing Benthid enters the battlefield, create two 0/2 blue Illusion creature tokens with "Whenever this creature blocks a creature, that creature doesn't untap during its controller's next untap step." Mesmerizing Benthid has hexproof as long as you control an Illusion. | Kev Walker

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

Skarrgan Hellkite | Creature | Dragon | Riot (This creature enters the battlefield with your choice of a +1/+1 counter or haste.) Flying {3}{R}: Skarrgan Hellkite deals 2 damage divided as you choose among one or two targets. Activate only if Skarrgan Hellkite has a +1/+1 counter on it. | Svetlin Velinov

Biogenic Ooze | Creature | Ooze | When Biogenic Ooze enters the battlefield, create a 2/2 green Ooze creature token. At the beginning of your end step, put a +1/+1 counter on each Ooze you control. {1}{G}{G}{G}: Create a 2/2 green Ooze creature token. | Lake Hurwitz

Dovin, Grand Arbiter | Legendary Planeswalker | Dovin | +1: Until end of turn, whenever a creature you control deals combat damage to a player, put a loyalty counter on Dovin, Grand Arbiter. −1: Create a 1/1 colorless Thopter artifact creature token with flying. You gain 1 life. −7: Look at the top ten cards of your library. Put three of them into your hand and the rest on the bottom of your library in a random order. | Kieran Yanner

Emergency Powers | Instant | | Each player shuffles their hand and graveyard into their library, then draws seven cards. Exile Emergency Powers. Addendum — If you cast this spell during your main phase, you may put a permanent card with mana value 7 or less from your hand onto the battlefield. | Chris Rallis

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

Hydroid Krasis | Creature | Jellyfish Hydra Beast | When you cast this spell, you gain half X life and draw half X cards. Round down each time. Flying, trample Hydroid Krasis enters the battlefield with X +1/+1 counters on it. | Jason Felix

Prime Speaker Vannifar | Legendary Creature | Elf Ooze Wizard | {T}, Sacrifice another creature: Search your library for a creature card with mana value equal to 1 plus the sacrificed creature's mana value, put that card onto the battlefield, then shuffle. Activate only as a sorcery. | Kieran Yanner

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

Domri, Chaos Bringer | Legendary Planeswalker | Domri | +1: Add {R} or {G}. If that mana is spent on a creature spell, it gains riot. (It enters the battlefield with your choice of a +1/+1 counter or haste.) −3: Look at the top four cards of your library. You may reveal up to two creature cards from among them and put them into your hand. Put the rest on the bottom of your library in a random order. −8: You get an emblem with "At the beginning of each end step, create a 4/4 red and green Beast creature token with trample." | Zack Stella

Ravager Wurm | Creature | Wurm | Riot (This creature enters the battlefield with your choice of a +1/+1 counter or haste.) When Ravager Wurm enters the battlefield, choose up to one — • Ravager Wurm fights target creature you don't control. • Destroy target land with an activated ability that isn't a mana ability. | Svetlin Velinov