Guilds of Ravnica

Burglar Rat | Creature | Rat | When Burglar Rat enters the battlefield, each opponent discards a card. | Tyler Walpole

Child of Night | Creature | Vampire | Lifelink | Igor Kieryluk

Mausoleum Secrets | Instant | | Undergrowth — Search your library for a black card with mana value less than or equal to the number of creature cards in your graveyard, reveal it, put it into your hand, then shuffle. | Adam Paquette

Severed Strands | Sorcery | | As an additional cost to cast this spell, sacrifice a creature. You gain life equal to the sacrificed creature's toughness. Destroy target creature an opponent controls. | Zack Stella

Whispering Snitch | Creature | Vampire Rogue | Whenever you surveil for the first time each turn, Whispering Snitch deals 1 damage to each opponent and you gain 1 life. | Jason Rainville

Dimir Spybug | Creature | Insect | Flying Menace (This creature can't be blocked except by two or more creatures.) Whenever you surveil, put a +1/+1 counter on Dimir Spybug. | James Paick

House Guildmage | Creature | Human Wizard | {1}{U}, {T}: Target creature doesn't untap during its controller's next untap step. {2}{B}, {T}: 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.) | Winona Nelson

Lazav, the Multifarious | Legendary Creature | Shapeshifter | When Lazav, the Multifarious enters the battlefield, surveil 1. (Look at the top card of your library. You may put it into your graveyard.) {X}: Lazav, the Multifarious becomes a copy of target creature card in your graveyard with mana value X, except its name is Lazav, the Multifarious, it's legendary in addition to its other types, and it has this ability. | Yongjae Choi

Thought Erasure | Sorcery | | Target opponent reveals their hand. You choose a nonland card from it. That player discards that card. Surveil 1. (Look at the top card of your library. You may put it into your graveyard.) | Anna Steinbauer

Discovery | Sorcery | | Surveil 2, then draw a card. (To 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.) | Mark Behm

Assassin's Trophy | Instant | | Destroy target permanent an opponent controls. Its controller may search their library for a basic land card, put it onto the battlefield, then shuffle. | Seb McKinnon

Glowspore Shaman | Creature | Elf Shaman | When Glowspore Shaman enters the battlefield, mill three cards. You may put a land card from your graveyard on top of your library. | Lars Grant-West

Swarm Guildmage | Creature | Elf Shaman | {4}{B}, {T}: Creatures you control get +1/+0 and gain menace until end of turn. (They can't be blocked except by two or more creatures.) {1}{G}, {T}: You gain 2 life. | Simon Dominic

Find | Sorcery | | Return up to two target creature cards from your graveyard to your hand. | Tomasz Jedruszek