Guilds of Ravnica

Blood Operative | Creature | Vampire Assassin | Lifelink When Blood Operative enters the battlefield, you may exile target card from a graveyard. Whenever you surveil, if Blood Operative is in your graveyard, you may pay 3 life. If you do, return Blood Operative to your hand. | Livia Prima

Midnight Reaper | Creature | Zombie Knight | Whenever a nontoken creature you control dies, Midnight Reaper deals 1 damage to you and you draw a card. | Sidharth Chaturvedi

Plaguecrafter | Creature | Human Shaman | When Plaguecrafter enters the battlefield, each player sacrifices a creature or planeswalker. Each player who can't discards a card. | Anna Steinbauer

Spinal Centipede | Creature | Insect | When Spinal Centipede dies, put a +1/+1 counter on target creature you control. | Zezhou Chen

Veiled Shade | Creature | Shade | {1}{B}: Veiled Shade gets +1/+1 until end of turn. | Anna Steinbauer

Darkblade Agent | Creature | Human Assassin | As long as you've surveilled this turn, Darkblade Agent has deathtouch and "Whenever this creature deals combat damage to a player, you draw a card." | Joe Slucher

Thief of Sanity | Creature | Specter | Flying Whenever Thief of Sanity deals combat damage to a player, look at the top three cards of that player's library, exile one of them face down, then put the rest into their graveyard. You may look at and cast that card for as long as it remains exiled, and you may spend mana as though it were mana of any type to cast that spell. | Igor Kieryluk

Whisper Agent | Creature | Human Rogue | Flash When Whisper Agent enters the battlefield, surveil 1. (Look at the top card of your library. You may put it into your graveyard.) | Deruchenko Alexander

Charnel Troll | Creature | Troll | Trample At the beginning of your upkeep, exile a creature card from your graveyard. If you do, put a +1/+1 counter on Charnel Troll. Otherwise, sacrifice it. {B}{G}, Discard a creature card: Put a +1/+1 counter on Charnel Troll. | Daniel Ljunggren

Erstwhile Trooper | Creature | Zombie Soldier | Discard a creature card: Erstwhile Trooper gets +2/+2 and gains trample until end of turn. Activate only once each turn. | Jason A. Engle

Ochran Assassin | Creature | Elf Assassin | Deathtouch All creatures able to block Ochran Assassin do so. | Anna Steinbauer

Pitiless Gorgon | Creature | Gorgon | Deathtouch | Alex Konstad