Satyr of the Hidden Paths

Shadow
{g}, Discard a land card: Put a +1/+1 counter on
target creature.
"Maps? There are no maps. I go by dark ways,
unclean ways. If such a map existed, it would be
beyond price. ... Such a map would have to be drawn
on the skin of a black he-goat, in virgin's blood, with a
brush made of dragon's eyelashes."
— Ursula Vernon