Aspect of the Stirge

You call forth the spiritual aspect of the stirge, a flickering shadow-winged presence that sharpens your sight in darkness and feeds upon the blood of your foes—growing more potent when your quarry is marked by Hunter’s Mark or when you fight upon the spirit’s favored terrain.

Base Effect. You gain Darkvision 60ft and your Movement speed increases by +5 feet. You may move through the space of hostile creatures that are Large or larger without treating it as difficult terrain.

Hunter’s Mark. Once per turn, when you hit a creature with a weapon attack, you deal an extra 1d4 piercing damage, and you gain temporary hit points equal to the damage dealt (minimum of 1).

Favored Terrain. (Mountain, Underdark, Cave) Whenever you gain temporary hit points from this spell, you may immediately move up to 5 feet without provoking opportunity attacks.

At Higher Levels. When cast using a 3rd or 4th-level spell slot: The duration increases to 1 hour. When cast using a 5th-level spell slot or higher: The duration increases to 8 hours.