Shapechanger. Zaeran can use its action to polymorph into a wolf-humanoid hybrid or into a wolf, or back into its true form, which is humanoid. Its statistics, other than its AC, 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. Zaeran has advantage on Wisdom (Perception) checks that rely on hearing or smell.

Fey Ancestry.  Zaeran has advantage on saving throws against being charmed, and magic can’t put you to sleep.

Trance. Elves don’t need to sleep. Instead, they meditate deeply, remaining semiconscious, for 4 hours a day. (The Common word for such meditation is “trance.”) While meditating, he can dream after a fashion; such dreams are actually mental exercises that have become reflexive through years of practice. After resting in this way, he gain the same benefit that a human does from 8 hours of sleep.

Fleet of Foot. Zaeran base walking speed increases to 35 feet.

Mask of the Wild. Zaeran can attempt to hide even when he is only lightly obscured by foliage, heavy rain, falling snow, mist, and other natural phenomena.

Multiattack. (Humanoid or Hybrid Form Only). Zaeran makes two attacks: two with its spear (humanoid form) or one with its bite and one with its claws (hybrid form).

Bite (Wolf or Hybrid Form Only). Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 6 (1d8 + 2) piercing damage. If the target is a humanoid, it must succeed on a DC 12 Constitution saving throw or be cursed with werewolf lycanthropy.

Claws. (Hybrid Form Only). Melee Weapon Attack: +4 to hit, reach 5 ft., one creature. Hit: 7 (2d4 + 2) slashing damage.

Spear (Humanoid Form Only). Melee or Ranged Weapon Attack: +4 to hit, reach 5 ft. or range 20/60 ft., one creature. Hit: 5 (1d6 + 2) piercing damage, or 6 (1d8 + 2) piercing damage if used with two hands to make a melee attack.