Guilds of Ravnica

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

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