Hex

Hex (sometimes known as Sheep) is a type of status effect that transforms the affected unit into a critter. While hexed, a unit's base movement speed is reduced to 100 and it is unable to perform actions that Heroes can, such as use, pick up, or drop items and cast spells. Also, hexed units cannot gain any experience.

Certain abilities (most notably Lycanthrope's Shapeshift) will grant maximum movement speed even while hexed.