Healing Elixir (3/Day). The alchemist brews specialized elixirs each day that only it can benefit from and that last until the day ends. As a bonus action, it can drink one of these elixirs and regain 8 (2d4 + 3) hit points.

Spellcasting. The alchemist is a 9th-level spellcaster. Its spellcasting ability is Intelligence (spell save DC 14, +6 to hit with spell attacks). It has the following artificer spells prepared. It can use alchemist's supplies as an arcane focus for its spells.

Cantrips (at-will): poison spray, renewal (new)
1st level (4 slots): cure wounds, grease, identify
2nd level (3 slots): enlarge/reduce, melf's acid arrow
3rd level (2 slots): protection from energy, stinking cloud

Multiattack. The alchemist makes two chemical vial attacks or two dagger attacks. In place of one of those attacks, it can cast a spell instead.

Dagger. Melee or Ranged Weapon Attack: +5 to hit, reach 5 ft. or range 20/60 ft., one target. Hit: 4 (1d4 + 2) piercing damage, and the target must make a DC 14 Constitution saving throw, taking 9 (2d8) poison damage on a failed save, or half as much damage on a successful one.

Chemical Vial (7/Day). Ranged Weapon Attack: +5 to hit, range 30/60 ft., one target. Hit: 1 slashing damage plus 15 (6d4) acid damage and 7 (2d6) poison damage.