Jackalwere redone as Hyenawere

The demon lord Yeenoghu created hyenaweres from ordinary hyenas to serve as spies and infiltrators for gnoll tribes, and advisors to gnoll pack lords.

Jackalwere Hyenawere
Medium humanoid (shapechanger), chaotic evil
Armor Class 12
Hit Points 18 (4d8)
Speed 4050ft.
STR 11 (+0)
DEX 15 (+2)
CON 11 (+0)
INT 13 (+1)
WIS 11 (+0)
CHA 10 (+0)
Skills Deception +4, Perception +2, Stealth +4
Immunities bludgeoning, piercing, and slashing damage from non magical weapons that aren't silvered
Senses passive Perception 12
Languages Common, Abyssal (can't speak in jackal hyena form)
Challenge 1/2 (100 XP)

Shapechanger. The jackalwere hyenawere can use its action to polymorph into a specific Medium human or a jackal-humanoid hybrid specific gnoll, or back into its true form (that of a Small jackal hyena). Other than its size, its Its statistics are the same in each form. Any equipment it is wearing or carrying isn't transformed.  It reverts to its true form if it dies.

Keen Hearing and Smell. The jackalwere has advantage on Wisdom (Perception) checks that rely on hearing or smell.

Pack Tactics. The jackalwere hyenawere has advantage on an attack roll against a creature if at least one of the jackalwere's hyenawere's allies is within 5 feet of the creature and the ally isn't incapacitated.

ACTIONS

Bite (Jackal Hyena or Hybrid Gnoll Form Only). Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 4 (1d4 + 2) piercing damage .

Scimitar (Human or Hybrid Gnoll Form Only). Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 5 (ld6 + 2) slashing damage.

Sleep Gaze. The jackalwere hyenawere gazes at one creature it can see within 30 feet of it. The target must make a DC 10 Wisdom saving throw. On a failed save, the target succumbs to a magical slumber, falling unconscious for 10 minutes or until someone uses an action to shake the target awake. A creature that successfully saves against the effect is immune to this jackalwere's hyenawere's gaze for the next 24 hours. Undead and creatures immune to being charmed aren't affected by it.