Aether blood

The most extravagant rumours claim the blood of a unicorn is required to make this purple substance, available in liquid form only.
Whether these mythical creatures exist or not, there’s no question that Aether Blood is highly magical in nature.
Glowing in the dark, it is said to significantly improve the magical attunement of the body, hence its popularity among spellcasters.
It allows users to cast spells faster and detect magical manifestations more easily, among other things.
However, even the most experienced spellcasters can’t bear the exhausting effects of this attunement on the body, which suffers significant premature ageing from prolonged usage. Many spellcasters carry a small reserve of Aether Blood for the most dire situations.
After consuming Aether Blood, when a creature uses a spell slot, it counts as 1 spell level higher when determining the level the spell was cast at.
If the spell has no additional effects when cast at a higher level, the Aether Blood has no effect. This effect lasts for 1 hour.
If a character consumes Aether Blood a number of times equal to their Constitution modifier (minimum of 1), they become addicted to it.
So a creature with a Constitution score of 16 will become addicted after consuming it for the third time.
An addicted creature must consume Aether Blood once every 24 hours or have disadvantage on Constitution ability checks and saving throws.
The addiction lasts until the creature is targeted with a greater restoration spell, or after 30 days of not consuming Aether blood.