Cavalier of Flame (125) [Core Set 2020 Promos]

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