Chaos Witch's Tattoo

Alter: While this tattoo is applied on your skin, whenever you cast a spell that can be cast at a higher level, roll a d20. On an 7-20, you cast the spell one level higher without needing to expend the higher level spell slot. On a 1-6, you cast the spell one level lower. If the spell was cast at base level, it is canceled and the spell slot is still expended.

Attunement: yes
Materials/cost: ???
Placement: Back
Rarity: Legendary
Produced by a special needle, this magic tattoo represents a being of unfathomable magical power.

the perfected version of the Forbidden Tattoo, with the safety mechanic, safely in the hands of the Bronte hags and the Faceless Immortal