Guilds of Ravnica

Bounty Agent | Creature | Human Soldier | Vigilance {T}, Sacrifice Bounty Agent: Destroy target legendary permanent that's an artifact, creature, or enchantment. | Randy Vargas

Dawn of Hope | Enchantment | | Whenever you gain life, you may pay {2}. If you do, draw a card. {3}{W}: Create a 1/1 white Soldier creature token with lifelink. | Sung Choi

Drowned Secrets | Enchantment | | Whenever you cast a blue spell, target player mills two cards. | Alexander Forssberg

Mission Briefing | Instant | | Surveil 2, then choose an instant or sorcery card in your graveyard. You may cast it this turn. If that spell would be put into your graveyard, exile it instead. (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.) | Matt Stewart

Narcomoeba | Creature | Illusion | Flying When Narcomoeba is put into your graveyard from your library, you may put it onto the battlefield. | Howard Lyon

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

Runaway Steam-Kin | Creature | Elemental | Whenever you cast a red spell, if Runaway Steam-Kin has fewer than three +1/+1 counters on it, put a +1/+1 counter on Runaway Steam-Kin. Remove three +1/+1 counters from Runaway Steam-Kin: Add {R}{R}{R}. | Jason Felix

Swiftblade Vindicator | Creature | Human Soldier | Double strike, vigilance, trample | Viktor Titov

Response | Instant | | Response deals 5 damage to target attacking or blocking creature. | Daarken

Emmara, Soul of the Accord | Legendary Creature | Elf Cleric | Whenever Emmara, Soul of the Accord becomes tapped, create a 1/1 white Soldier creature token with lifelink. | Mark Winters

Assure | Instant | | Put a +1/+1 counter on target creature. That creature gains indestructible until end of turn. | Jason A. Engle

Firemind's Research | Enchantment | | Whenever you cast an instant or sorcery spell, put a charge counter on Firemind's Research. {1}{U}, Remove two charge counters from Firemind's Research: Draw a card. {1}{R}, Remove five charge counters from Firemind's Research: It deals 5 damage to any target. | Grzegorz Rutkowski

Expansion | Instant | | Copy target instant or sorcery spell with mana value 4 or less. You may choose new targets for the copy. | Deruchenko Alexander

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

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