Pyron, Hellstorm

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