Cavalier of Flame

“1R: Creatures you control get +1/+0 and gain haste until end of turn. <br>When Cavalier of Flame enters the battlefield, discard any number of cards, then draw that many cards. <br>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.”