Fey'ri, Mycologist Pyromancer

{x}, {t}: put a Mushroom counter on up to X
lands you control.
Lands you control with Mushroom counters on
them have "{t}: Deal 1 damage to any target."
Remove X mushrooms counters from lands you
control: cast an instant, sorcery, or enchantment
spell from your graveyard with mana cost X.