Guilds of Ravnica

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

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

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