Blotkin Ooze

Amorphous (Blob Form Only). The ooze can move through a space as narrow as 1 inch without expending extra movement to do so.

Corrosive Form. A creature that hits the ooze with a melee attack roll takes 4 (1d8) Acid damage. Nonmagical ammunition is destroyed immediately after hitting the ooze and dealing any damage. Any nonmagical weapon takes a cumulative −1 penalty to attack rolls immediately after dealing damage to the pudding and coming into contact with it. The weapon is destroyed if the penalty reaches −5. The penalty can be removed by casting the Mending spell on the weapon.

In 1 minute, the ooze can eat through 2 feet of nonmagical wood or metal.

Light Sensitivity. While in Bright Light, the ooze has Disadvantage on ability checks and attack rolls.

Puppeteer (Possessed Form Only). When the ooze possesses a creature, it may do so indefinitely unless the ooze has the Incapacitated condition, or if the creature under Possession successfully makes their Constitution Saving Throw. Effects like Turn Undead, the Banishment spell, the Dispel Evil and Good spell, or the Hallow spell can exorcise the ooze from the target's body.

Regeneration. The ooze regains 10 hit points at the start of its turn if it has at least 1 hit point and isn’t in Bright Light. If the ooze takes Radiant damage, Fire damage, or damage from Holy Water, this trait doesn’t function at the start of the ooze's next turn.

Multiattack (Possessed Form Only). The ooze may make two attacks, using either the Ooze-improved Slam or the Ooze-improved Burst.

Ooze-improved Slam (Possessed Form Only). Melee Attack Roll: +6, reach 5 ft. Hit: 9 (1d10 + 4) Acid damage plus 3 (1d6) Necrotic damage.

Ooze-improved Burst (Possessed Form Only). Ranged Attack Roll: +6, range 120/300 ft. Hit: 9 (1d10 + 4) Acid damage plus 3 (1d6) Necrotic damage.

Pseudopod (Blob Form Only). Melee Attack Roll: +5, reach 5 ft. Hit: 7 (1d8 + 3) Acid damage plus 3 (1d6) Necrotic damage. If the target is a Medium or smaller creature, it has the Grappled condition (escape DC 13).

Puppet (Blob Form Only). Constitution Saving Throw: DC 14, one creature within 5 feet that is willing or that has the Grappled, Incapacitated, or Restrained condition. Failure: 3 (1d6) Acid damage, and the ooze claims full Possession of that creature. At the end of the possessed creature's turn, they may make the Constitution Saving Throw, ending the effect on a success. After three failed saving throws, the possessed creature may not do so again until after a long rest.

Shadow Touched (Recharge 6). While in Dim Light or Darkness, the ooze can gain the Invisibility spell effect for 1 minute.