This alchemical ritual looks like a chemistry experiment
with deep meditation, chanting, and bloodletting.

Thought to be the key to immortality, it results
in a thick vermillion potion, both chalky and sharply
sour, made in part from cinnabar (mercury sulfide),
fine-powdered gold, and the pungent and faintly acidic
excretions of an unseen, extradimensional presence.

The ritual takes effect after the operator drinks the potion,
which otherwise loses all potency in 1D4 hours.

The ritual adds 3D6 to the operator’s CON score.
The added CON points fade at 1 per month. Each
time the operator uses the ritual, it permanently costs
1 INT. But the INT loss does not apply right away.
As long as the operator remains under the potion’s
effects, the INT loss does not accrue. If the potion ever
wears off entirely, all INT lost to all uses of the ritual
accrue at once.