Peak Shadow
Traits
Mountain Camouflage. Advantage on Hide checks on rocky/mountainous terrain; no cover needed. Ambush Killer. Its first attack from Hidden deals 22 (5d8) extra damage. High Altitude. Unaffected by altitude effects; unaffected by wind.
Actions
Multiattack. One Bite and two Talon attacks. Bite. Melee Attack Roll: +9, reach 5 ft. Hit: 18 (3d8 + 5) Piercing damage. Talon. Melee Attack Roll: +9, reach 5 ft. Hit: 12 (2d6 + 5) Slashing damage. Snatch and Drop (Recharge 5–6). The Peak Shadow snatches a creature. DC 17 DEX save. Failure: The target has the Grappled condition (escape DC 17). The Peak Shadow immediately climbs upward at its Fly speed (up to 60 feet) and drops the target. The target takes fall damage (1d6 per 10 feet, max 20d6) and has the Prone condition.
Bonus Actions
Vanish. Moves half its Speed (doesn't provoke Opportunity Attacks) and takes the Hide action.
Key
Prepare for Snatch and Drop — Feather Fall, flight, or high DEX. And open, level terrain (Mountain Camouflage doesn't work there).