Core Set 2020

Dungeon Geists | Creature | Spirit | Flying When Dungeon Geists enters the battlefield, tap target creature an opponent controls. That creature doesn't untap during its controller's untap step for as long as you control Dungeon Geists. | Nils Hamm

Fortress Crab | Creature | Crab | | Vincent Proce

Octoprophet | Creature | Octopus | When Octoprophet enters the battlefield, scry 2. (Look at the top two cards of your library, then put any number of them on the bottom of your library and the rest on top in any order.) | Grzegorz Rutkowski

Yarok's Wavecrasher | Creature | Elemental | When Yarok's Wavecrasher enters the battlefield, return another creature you control to its owner's hand. | Randy Vargas

Kykar, Wind's Fury | Legendary Creature | Bird Wizard | Flying Whenever you cast a noncreature spell, create a 1/1 white Spirit creature token with flying. Sacrifice a Spirit: Add {R}. | G-host Lee

Omnath, Locus of the Roil | Legendary Creature | Elemental | When Omnath, Locus of the Roil enters the battlefield, it deals damage to any target equal to the number of Elementals you control. Landfall — Whenever a land enters the battlefield under your control, put a +1/+1 counter on target Elemental you control. If you control eight or more lands, draw a card. | Lius Lasahido