Abominable Amorphous Amoeba

5th-level necromancy

Casting Time:1 action
Range:Touch
Components:V, S, M
Duration:Instantaneous
Target: A prepared glass orb costing 1,000 gp and taking 1d4 weeks to prepare

You prepare a glass orb and fill it with an eldritch alchemical fluid. The crafting cost of the orb is 1,000 gp, and it takes 1d4 weeks to prepare. When you cast the spell, the liquid becomes a terrible living, single-celled creature. You can use an action to throw the orb against an opponent, at which point the sphere shatters and the uncontrolled beast is released. The beast then begins to feed, fueling its awful growth. You are not in control of the creature.

The creature starts with 2d8 hit points and fills one five-foot square. Any creature that starts its turn within five feet of the beast or comes within that distance for the first time on its turn must make a DC 15 Dexterity saving throw. The creature takes 1d8 acid damage on a failure and half as much on a success. A creature brought to 0 hit points by the beast is consumed and dead. A consumed creature cannot be brought back to life. The beast gains hit points equal to the damage taken by its targets. For every 30 hit points the creature has, it covers one additional five-foot square. The creature is an ooze and can share a square with another creature. A creature in the same square as the ooze has disadvantage on its saving throws against the ooze. The ooze has AC 15 and is immune to acid, bludgeoning, piercing, poison, and psychic damage. It is immune to the grappled and prone conditions. It moves at 10 feet toward the closest living creature.