Armor Class 16 (gimp suit + high dex)
Hit Points 37 (5d8+15)
Speed 40 ft, ignores difficult terrain; Spiderclimb
Skills: Acrobatics +8, Athletics +8, Stealth +6, Perception +6
Senses: Blindsense, 60 ft.
Languages: Understands Common, but can’t speak
Moving Target: The messergeist’s constantly swaying stance makes it especially difficult to hit.. Creatures attempting a ranged attack from more than 30 ft. away have disadvantage on the attack roll. If a creature fails any attack roll against the messergeist by 5 or more, apply the same result against another viable target adjacent to the messergeist.
The messergeist can make up to two limb-blade or impaling thrust attacks each round.
Limb-blade: melee attack +8 (1d8+3 slashing damage).
Slashing Skitter: As a full-round action, the messergeist moves its speed, making three limb-blade attacks at any point during the movement.
Impaling thrust: melee attack +10 (1d8 piercing damage and target is grappled).
Pin Down: As a bonus action, the messergeist can knock prone and immobilize a creature it has grappled with impaling thrust.
Living Shield: As a reaction, the messergeist can transfer the damage it suffers from one attack or single-target effect to a creature it has grappled with impaling thrust