Stalwart. The Alderkin's many layers provides protection. When taking damage from an attack, reduce the damage by 3. Camouflage. When the Alderkin is still, it is indistinguishable from an ordinary plant. It can take the Hide action as a bonus action and hide when only lightly obscured.
Headbutt. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit 4 (1d4+2) bludgeoning damage and the target is pushed back 5 feet and knocked prone if it is medium size or smaller.