Guilds of Ravnica

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

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

Izoni, Thousand-Eyed | Legendary Creature | Elf Shaman | Undergrowth — When Izoni, Thousand-Eyed enters the battlefield, create a 1/1 black and green Insect creature token for each creature card in your graveyard. {B}{G}, Sacrifice another creature: You gain 1 life and draw a card. | Eric Deschamps

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

Chamber Sentry | Artifact Creature | Construct | Chamber Sentry enters the battlefield with a +1/+1 counter on it for each color of mana spent to cast it. {X}, {T}, Remove X +1/+1 counters from Chamber Sentry: It deals X damage to any target. {W}{U}{B}{R}{G}: Return Chamber Sentry from your graveyard to your hand. | Adam Paquette

Overgrown Tomb | Land | Swamp Forest | ({T}: Add {B} or {G}.) As Overgrown Tomb enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped. | Yeong-Hao Han