Alchemical Form

Level: 6 transmutation
Classes:
Casting Time: 1 action
Range: Self
Components: V, S, M (a vial of acid, poison, or alchemist&#39;s fire)
Duration: 1 minute
Source: Deep Magic 5e

You transform into an amoebic form composed of highly acidic and poisonous alchemical jelly. While in this form:

you are immune to acid and poison damage and to the poisoned and stunned conditions;
you have resistance to nonmagical fire, piercing, and slashing damage;
you can’t speak, cast spells, use items or weapons, or manipulate objects;
your gear melds into your body and reappears when the spell ends;
you don't need to breathe;
your speed is 20 feet;
your size doesn’t change, but you can move through and between obstructions as if you were two size categories smaller; and
you gain the following action: Melee Weapon Attack: spellcasting ability modifier + proficiency bonus to hit, range 5 ft., one target; Hit: 4d6 acid or poison damage (your choice), and the target must make a successful Constitution saving throw or be poisoned until the start of your next turn.