Werebard

Shapechanger. The werebard 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 except for their instrument which transforms into a gnarled wooden version made from dark black ebony and gives a +1 to their spell DC. It reverts to its true form if it dies.

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

Spellcasting. The werebard is a 4th-level spellcaster. Its spellcasting ability is Charisma (spell save DC 12, +4 to hit with spell attacks). It has the following bard spells prepared:

Cantrips (at will): friends, thunderclap, vicious mockery

1st level (4 slots): bane, charm person, dissonant whispers, sleep, thunderwave

2nd level (3 slots): crown of madness, shatter

Cursed Song. The werebard can perform a song as an action targetting a humanoid creature. The target must succeed on a DC 12 Constitution saving throw or take 5 (1d6+2) psychic damage and be cursed with werewolf lycanthropy, a successful save takes half damage and is not cursed.

Song of Rest. The werebard can perform a song while taking a short rest. Any ally who hears the song regains an extra 1d6 hit points if it spends any Hit Dice to regain hit points at the end of that rest. The bard can confer this benefit on itself as well.

Taunt (2/Day). The werebard can use a bonus action on its turn to target one creature within 30 feet of it. If the target can hear the bard, the target must succeed on a DC 12 Charisma saving throw or have disadvantage on ability checks, attack rolls, and saving throws until the start of the bard’s next turn.

Multiattack. (Humanoid or Hybrid Form Only). The werewolf 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.