Maltarith, Lord of Flame

First strike, menace, undying

Whenever Maltarith attacks, each opponent discards a card. For each opponent who can’t, you draw a card.

Whenever an opponent discards a land card, add {r}. Until end of turn, you don’t lose this mana as steps and phases
end.

{x}{x}{r}, {t}: Maltarith deals X damage to each blocking creature your opponents control.