Forest Spirit

Forest Spirits are creep units in Warcraft III: Reign of Chaos. They appear only in the orc mission The Spirits of Ashenvale. They have the appearance of ghosts, and are listed as undead. They guarded a number of artifacts held within circles of mushrooms from the invading Warsong clan.

Forest Spirit statistics in Warcraft III

 * Level: 6
 * 300 HP
 * 400 MP
 * 10-15 pierce damage
 * Abilities
 * Spell immunity
 * Sleep

Speculation
They are likely related to wisps, the nature spirits who inhabit forests; most notably Ashenvale.

Espíritu del bosque