False Appearance. While the spriggan remains motionless in a forested terrain, it resembles a clump of roots and has advantage on Stealth checks to remain hidden.

Magic Resistance. The spriggan has advantage on saving throws against spells and other magical effects.

Nature Lord. Forest creatures with an intelligence score of 4 or lower will never willingly attack a spriggan, whom they see as a lord of the forest. Animals that are charmed, or who possess some sort of overriding loyalty (such as a Ranger’s companion or an animal servant of another fey creature) may be willing to attack it. 

Multiattack. The spriggan makes two claw attacks.

Claws. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 19 (3d10+3) piercing damage. Target creature must succeed a DC 16 Constitution saving throw or take 7 (2d6) poison damage and are poisoned.

Awaken Swarm (1/day). The spriggan may use its action to summon 1d4 Swarms of Wasps (see Monster Manual p. 338) which act on the same initiative order as the spriggan and are under its control. The swarms emerge from the branches of the spriggan and may act on the same round they are summoned; on subsequent rounds the spriggan may use its bonus action to command the swarms. If they receive no commands, the swarms attack whatever enemy of the spriggan to which they are closest. The swarms remain for 1 hour, until the spriggan dies, or until they are recalled as a bonus action.