Potion of Inversion

A Potion of Inversion reverses the effects of the things it encounters. If you drink it yourself, you acquire the Inverted status, which reverses the effects of spells you cast; if you mix it with most potions or magical items, it turns them into their opposite. Certain monsters can also be inverted; throwing a potion at them will turn them into their opposite. Like all potions, it has no effects on fountains.

Creating a Potion of Inversion
Potions of inversion are among the easiest potions to create. Aside from finding them scattered randomly in the dungeon, you can produce one by mixing any potion with its opposite; you also receive one as a side-effect of mixing a Potion of Dissolution with anything else (excluding potions of Inversion, Change, or Duplication, which are in this case trumped by other formulas.)

Mixing Potions of Inversion
The following potions are opposites; mixing a potion of inversion with one will produce the other, while mixing the two potions with each other will produce a potion of inversion.

Potion of Change <-> Potion of Permanence

Potion of Duplication <-> Potion of Dissolution

Potion of Energy <-> Potion of Absorption

Potion of Life <-> Potion of Death

The potion of inversion itself has no opposite and cannot be mixed with itself. The Potion of Gain Life, Potion of Final Death, and Potion of Gain Energy count as potions of Life, Death, and Energy respectively when used in mixes. Mixing a potion of inversion with one of those will result in potions of Death, Life, or Absorption rather than any permanence-enhanced versions.

Mixing with scrolls results in a scroll of the inverted spell.

Some tokens can be inverted.

Token of Ath <-> Token of Mhiu

Token of Sateja <-> Token of Laxuno

Other items can be inverted as well.

Fragment of a Blue Mote <-> Fragment of a Red Mote