Core Set 2020

Ironroot Warlord | Creature | Treefolk Soldier | Ironroot Warlord's power is equal to the number of creatures you control. {3}{G}{W}: Create a 1/1 white Soldier creature token. | Filip Burburan

Risen Reef | Creature | Elemental | Whenever Risen Reef or another Elemental enters the battlefield under your control, look at the top card of your library. If it's a land card, you may put it onto the battlefield tapped. If you don't put the card onto the battlefield, put it into your hand. | Johan Grenier

Creeping Trailblazer | Creature | Elemental | Other Elementals you control get +1/+0. {2}{R}{G}: Creeping Trailblazer gets +1/+1 until end of turn for each Elemental you control. | Johan Grenier

Kethis, the Hidden Hand | Legendary Creature | Elf Advisor | Legendary spells you cast cost {1} less to cast. Exile two legendary cards from your graveyard: Until end of turn, each legendary card in your graveyard gains "You may play this card from your graveyard." | Yongjae Choi

Yarok, the Desecrated | Legendary Creature | Elemental Horror | Deathtouch, lifelink If a permanent entering the battlefield causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time. | Daarken

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