Trolath, Terror of the Forest

Menace, trample
Discard a creature card, you draw cards equal to
its power, and you gain life equal to its
toughness. Activate this ability only up to one
time each turn, and only any time you could cast
a sorcery.
{b}{g},{t}: Target creature gets -X/-X until end of
turn, where X is the number of lands you
control. You lose X life.