crepsley:

Spriggans are beings which are made entirely of wood and magical energy; the source of which is their Taproot. Spriggans are attracted to Taproot, and Hagravensmanipulate this weakness by hanging Taproots from trees to attract Spriggans. Hagravens will sacrifice them for their magical characteristics and because of their hatred of nature.

Some Spriggans may be encountered hiding in trees, and step from them when the Dragonborn comes too close. Despite this, all Spriggans may be found with Aura Whisper or Detect Life.

In combat, Spriggans have the ability to use the invisibility spell, heal themselves quickly when low on health, and attack their target with a unique novice Destructionspell in the form of swarm of bees which can poison their target. When in Melee range, they can swipe at the Dragonborn with their claw-like appendages which can also poison.

Their most notable ability is their ability to enthrall the nearby wildlife - including animals not normally hostile like deer, goats and foxes - to come to their aid; enthralled animals bear a green aura and the effect can be overridden with the Animal Allegiance or Kyne’s Peace shouts, or prevented entirely with the Voice of the Sky effect from the 7000 Steps Etchings. After casting this spell they become invisible for 5 seconds, but the invisibility can be broken by being attacked. The animals remain enthralled after the Spriggan is defeated.