Inverted

While Inverted, all spells you cast have an opposite effect. For example, Armor will instead Curse enemies. Casting Dig while Inverted Creates Boulders. In most cases, this is useful as long as it is planned -- eg, you don't want to invert Teleport for Fetch, only to realize that you have no immediate avenue of escape.

Obtained from

 * Using or throwing a Potion of Inversion on yourself.
 * Walking into a Fountain of Inversion
 * Looking into a Inverted Mirror (Magic mirror + Inversion Potion)
 * Wearing Amulet of Inversion

Cured by

 * Inverting yourself again.
 * Potion of Dissolution or Cloud of Primal Order

Useful Inversions
Elemental Spells
 * Dig > Create Boulder : Creates a boulder in touch range. Boulders act identically to walls, but you can see through them.

Light Spells
 * Pacify > Berserk : Cast on self for increased melee damage, or cast on enemies to stop ranged attacks and cause infighting.


 * Armor > Curse : Inflict extra damage on cursed enemies.


 * Heal > Harm : Deal heavy damage to living creatures.

Cosmic Spells
 * Slow > Haste : Generally more useful than slow, as slow affects one target, while haste affects yourself.


 * Gravity > Anti-Gravity: Grants Levitation, which allows you to cross dangerous terrain without effect.

Arcane Spells
 * Push > Leap : Allows you to 'jump' in the direction you chose. This lets you move over enemies and acid, so it's useful for a cheap get-away.


 * Detect Creatures > Detect Walls : Detects walls within a wide radius. At the very least ensures that you won't turn into an open space when you don't want to. However, like most reveal abilities, this overwrites all currently explored tiles.


 * Teleport > Fetch : Brings items on one tile in sight range to a tile next to you. Not amazingly useful (at least, compared to the 'get out of mob free' spell of Teleport), but if you manage to see a Level Orb before its guardians see you, you can usually cast Fetch, nab the orb, and flee.

Tokens
 * Token of Ath <> Token of Mhiu
 * Token of Sateja <> Token of Laxuno

Gems
 * Ruby <> Sapphire
 * Emerald <> Topaz

Potions
 * Change > Permanence : Permanence potions seem less common than the blue Change. Great for maintaining effects or repairing equipment.

Enemies
 * Black Unicorn <> White Unicorn : White Unicorns are immediately friendly. Even after the invert wears off, the Black Unicorn will remain friendly.
 * Red Dragon <> Blue Dragon or Green Dragon <> Yellow Dragon : Play to your elemental resistances.