Xoblob Jr.

Xoblob Jr. is a gold dragon plushie within the Old Xoblob Shop in Waterdeep. It spends its day sitting ontop of Xoblob's income.

Plushie Form
When deactivated, the Greed Golem takes on the appearance of a small gold dragon plushie about 1'2" in height. In this form the golem appears to be lifeless, spending his days as a mascot for the Old Xoblob Shop sitting on a pile of gold supplied by the proprietor Xoblob.

Golem Form
When activated, the Greed Golem grows to be 6'0", tearing and stretching its plushie skin in the process. It grows a monstrous mouth on its belly and a black tongue covered in an oil-like substance.

When the Lif of the Party were accompanying Jarlaxle Baenre into the Vault of Dragons, it was revealed the Greed Golem was programmed to enter this form only upon receiving the password: the word "friend" spoken in dwarvish.

Personality
The Greed Golem doesn't have a will of its own, and operates similar to a robotic AI. It appears to be able to listen to others and comprehend what they're saying--but it doesn't act with any self-interest of its own. Instead, it seems to attack anybody in an attempt to devour them into the Vault of Dragons.

Tides of Time Saga
The Greed Golem was first introduced to the campaign as the small plushie gold dragon under the alias Xoblob Jr--given to it by Xoblob himself. For the longest time, the Lif of the Party along with the general city of Waterdeep believed the plushie to be an inanimate object of which Xoblob regarded as his son.

The Vault of Dragons
After gaining the Stone of Galore, Jarlaxle Baenre discovered the true form of the plushie Xoblob Jr. as that of the hidden entrance to Lord Dagult Neverember's Cache of Dragons. In its true form, the Greed Golem was created to hide the vault from prying eyes until Neverember would return to take the gold for himself.

Skills and Abilities
Magic Resistance: The Greed Golem has an easier time resisting magical effects that other creatures might struggle against.

Immutable Form: Due to his shapeshifting nature, the Greed Golem is immune to effects that would alter its form.

Greedy Regeneration: Like a dragon, the Greed Golem has a desire for gold and seeks to devour it. When it does, it can use the gold to replenish itself.

Abyssal Whispers: Fueled by abyssal spirits, those within 15 feet of the Greed Golem can hear their whispers.

Paralyzing Tongue: The Greed Golem's uses a paralyzing substance from his tongue to disable his foes, so he can devour them whole. Devour: The Greed Golem can devour foes as large as him or smaller, eating them whole. When he does so, they are transported to the Vault of Dragons--a demiplane built within him.

Condition Immunities: Due to his identity as a construct, the Greed Golem has shown immunities to the charmed, exhaustion, frightened, paralyzed, petrified, and poisoned conditions.

Xoblob
The Greed Golem's relationship to the crazy gnome is that of a one-sided father-son relationship. Xoblob regards the greed golem as his son and treasures him deeply. However the greed golem mostly appears inanimate--and when otherwise appears to disregard Xoblob as a bystander.

It is unknown when exactly the two were brought together or how Xoblob came to adore the greed golem, but it remains that the greed golem appears to have some special attachment the Old Xoblob Shop.

Dagult Neverember
While the Vault of Dragons and the greed golem were built by dwarves, Dagult Neverember was the man-with-the-plan behind their construction. While the greed golem doesn't appear to have any known affinity for the Lord of Neverwinter, the man is responsible for his creation and knows his mechanisms inside and out.