Amulet of the Polymorphing Gecko

Fabrication:

  Crafting this talisman nessesitates you to kill, eat and get a blood sample of an aberration, a beast, a dragon, an elemental, a fey, a giant, a humanoid, a monstrosity, an ooze, a plant, and an undead. The ingredients for the food must be properly coocked and seazoned and the soon to be attuned creature must consume all of them. Separetly, at the same time, another person (or a clone of the soon to be attuned) must inscribe the contents of a scroll of "True Polymorph" onto a sacrificial runestone bathed in a soup made out of all the blood samples that have been collected. Finally, the soon to be attuned must be presented witht he bloody runes and must read them outloud before licking it clean.

Effects and Features:

Fused. This item cannot be unequiped or separated from your person. It is also attuned to you forever and you cannot unattune from it. The amulet also allows you to select up to two attunement items and count them as attuned without occupying any attunement slots.

Inmense Hunger. You must consume the flesh of a living being to remain sane. You may still enjoy other foods, but you must eat 4 times the normal needed amount.

Perfect Regeneration. You are constantly regenerating (without side effects). You can control your regeneration, allowing for you to equip items that would require your body to be damaged in non lethal ways. While in combat, at the start of every turn you heal 2 hitdie + Con + Prof. 

Gecko's Polymorphing. You are able to turn into other creatures as if you were using the spell True Polymorph, bunt only being able to turn into any creature you have ever eatten and killed (Even before you attuned to this item).

Talismam's Warding. You are resistante to Psychic damage and have advantage on Wisdom and Intelligence Savingthrows. You are also protected from any magical effect that makes you lose abillity stat score points.

Talisman's Strengthening Bond. As long as you are fused to the amulet, you gain +2 to 2 abillities' scores of your choosing.

Notes: Bonus: Choose an Ability Score to increase by 2, Bonus: Choose an Ability Score to increase by 2, Advantage: Intelligence Saving Throws, Advantage: Wisdom Saving Throws, Resistance: Psychic, Have dinner with several ingredients coming from different creatures.