Core Set 2020

Cavalier of Night | Creature | Elemental Knight | Lifelink When Cavalier of Night enters the battlefield, you may sacrifice another creature. When you do, destroy target creature an opponent controls. When Cavalier of Night dies, return target creature card with mana value 3 or less from your graveyard to the battlefield. | Viktor Titov

Kaalia, Zenith Seeker | Legendary Creature | Human Cleric | Flying, vigilance When Kaalia, Zenith Seeker enters the battlefield, look at the top six cards of your library. You may reveal an Angel card, a Demon card, and/or a Dragon card from among them and put them into your hand. Put the rest on the bottom of your library in a random order. | Yongjae Choi

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