Bard's Shadow

Melodious Encore. Upon this creature reaching 0 hit points, it will heal 28 (2d20+7) HP and 17 temporary HP. After reaching 0 HP again, the creature can roll a CON save (DC19) and trigger the effect again. This save can be rolled once. 

Orchestra. For each bard ally of this creature, it gains a use of Inspire. 

Spellcasting. The Bard's Shadow is a 7th-level spellcaster. Its spellcasting ability is CHA (spell save DC 15, +7 to hit with spell attacks). The Bard's Shadow has following Barr spells prepared:
Cantrips (at will): Chill Touch, Vicious Mockery, Blade Ward
1st level (4 slots): Healing Word, Bane, Thunder Wave

2nd level (3 slots): Blindness/Deafness, Hold Person, Silence

3rd level (3 slots): Fear, Glyph of Warding, Mass Healing Word

4th level (1 slot): Confusion

Prayer to Muse. If this creature is heavily obscured, it can use an action to pray to Muse. On an initiative count of 20, one enemy creature will be chosen at random, and they must roll a DEX save (DC12) or take 40 (6d10+7) thunder damage. This can be done once per battle.

Inspire. Provide an ally advantage on their next roll.

Crossbow Shot. RangedWeapon Attack: +5 to hit, range 20/40 ft., 1 target. Hit:  10 (2d4+ 5) piercing damage.