Core Set 2020

Cavalier of Flame | Creature | Elemental Knight | {1}{R}: Creatures you control get +1/+0 and gain haste until end of turn. When Cavalier of Flame enters the battlefield, discard any number of cards, then draw that many cards. When Cavalier of Flame dies, it deals X damage to each opponent and each planeswalker they control, where X is the number of land cards in your graveyard. | Wesley Burt

Fire Elemental | Creature | Elemental | | Joe Slucher

Rapacious Dragon | Creature | Dragon | Flying When Rapacious Dragon enters the battlefield, create two Treasure tokens. (They're artifacts with "{T}, Sacrifice this artifact: Add one mana of any color.") | Johan Grenier

Reduce to Ashes | Sorcery | | Reduce to Ashes deals 5 damage to target creature. If that creature would die this turn, exile it instead. | Jason A. Engle

Golos, Tireless Pilgrim | Legendary Artifact Creature | Scout | When Golos, Tireless Pilgrim enters the battlefield, you may search your library for a land card, put that card onto the battlefield tapped, then shuffle. {2}{W}{U}{B}{R}{G}: Exile the top three cards of your library. You may play them this turn without paying their mana costs. | Joseph Meehan