Twitch the Greataxe
Twitch has the appearance of an exceedingly mundane greataxe, easy to overlook even in an otherwise empty room. Upon very close inspection, the greataxe’s metal has a very faint dark green tint, though efforts to identify the metal always conclude “standard iron.” The wielder experiences a significant increase in desire for order, which may result in absentmindedly organizing loose items, stacking rocks in patterns, or being mildly uncomfortable around wrinkly clothing. Twitch has all of the properties of a +1 greataxe and refuses to be attuned to all except Grognak while he is alive.
Eye of the Storm (Level 3): Twitch grants its user invisibility while the user remains motionless. After one round (six seconds) of absolute immobility, Twitch, its wielder, and all items carried by the wielder vanish from normal sight. So much as turning one’s head is enough to dispel the effect, though one may speak without breaking invisibility. Upon moving or attacking, visibility resumes; if attacking, the user is still granted advantage as normal under the Invisible condition. In addition, Twitch grants its wielder an extra attack when breaking invisibility, and rolling a 10 or higher on the damage dice or scoring a critical hit automatically renews invisibility.