Guilds of Ravnica

Light of the Legion | Creature | Angel | Flying Mentor (Whenever this creature attacks, put a +1/+1 counter on target attacking creature with lesser power.) When Light of the Legion dies, put a +1/+1 counter on each white creature you control. | Alex Konstad

Loxodon Restorer | Creature | Elephant Cleric | Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.) When Loxodon Restorer enters the battlefield, you gain 4 life. | Svetlin Velinov

Citywatch Sphinx | Creature | Sphinx | Flying When Citywatch Sphinx dies, surveil 2. (Look at the top two cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.) | Magali Villeneuve

Dream Eater | Creature | Nightmare Sphinx | Flash Flying When Dream Eater enters the battlefield, surveil 4. When you do, you may return target nonland permanent an opponent controls to its owner's hand. (To surveil 4, look at the top four cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.) | Daarken

Book Devourer | Creature | Beast | Trample Whenever Book Devourer deals combat damage to a player, you may discard all the cards in your hand. If you do, draw that many cards. | Kev Walker

Affectionate Indrik | Creature | Beast | When Affectionate Indrik enters the battlefield, you may have it fight target creature you don't control. (Each deals damage equal to its power to the other.) | Steve Prescott

Vigorspore Wurm | Creature | Wurm | Undergrowth — When Vigorspore Wurm enters the battlefield, target creature gains vigilance and gets +X/+X until end of turn, where X is the number of creature cards in your graveyard. Vigorspore Wurm can't be blocked by more than one creature. | Jason Felix

Swathcutter Giant | Creature | Giant Soldier | Vigilance Whenever Swathcutter Giant attacks, it deals 1 damage to each creature defending player controls. | Aaron Miller

Niv-Mizzet, Parun | Legendary Creature | Dragon Wizard | This spell can't be countered. Flying Whenever you draw a card, Niv-Mizzet, Parun deals 1 damage to any target. Whenever a player casts an instant or sorcery spell, you draw a card. | Svetlin Velinov

Izoni, Thousand-Eyed | Legendary Creature | Elf Shaman | Undergrowth — When Izoni, Thousand-Eyed enters the battlefield, create a 1/1 black and green Insect creature token for each creature card in your graveyard. {B}{G}, Sacrifice another creature: You gain 1 life and draw a card. | Eric Deschamps

Gatekeeper Gargoyle | Artifact Creature | Gargoyle | Flying Gatekeeper Gargoyle enters the battlefield with a +1/+1 counter on it for each Gate you control. | Adam Paquette