A rough, brittle crystalline substance. Flakes seem to detach themselves of the crystal at random intervals, staining your bags with a sickly silver.
Perfected Decay is an item that can be applied to your wands. This will make your selected wand cursed, but instead of the usual randomness inherent to cursed wands, its effect will change depending on what wand it is.
Perfected Decay can be obtained either by alchemy or in secret rooms.
Modified Effects
Magic Missile
On use, Magic Missile will shoot out a damaging bolt. If it kills, a random wand you own will gain +1 for ((MM level/2)+1) uses and you will gain a few turns of wand recharging. If it doesn't, a random wand of yours will lose 1 charge and be degraded for ((MM level/2)+1) turns.
Fireblast
On use, Fireblast will shoot out the usual cone of fire, but it will also set every adjacent tile on fire for 2 turns. Whenever you damage an enemy that is already on fire with Fireblast, they will explode, dealing additional damage and destroying items/terrain.
Frost
The frost bolts will leave behind a trail of blizzard gas that dissipates quickly. On use, it will apply Chilled to every creature in a radius equivalent to its level, you included.
Lightning
On use, Lightning will spew out several lightning branches that will arc out, like real lightning except a bit more horizontal. The arching lightning will prioritize targets with metal on them, like most machines, Gnoll Brutes, and you.
Disintegration
The disintegration beams will destroy anything in their trajectory, save for solid walls. This includes statues, doors, iron locked doors (not boss or crystal), chests, ground items and even active traps. It will deal greatly increased damage for every object destroyed (like really high damage boosts) and has the added bonus of instantly killing mimics.
Prismatic Light
On use, Prismatic Light will blind everything in the room for some time. Some enemies are immune to this effect.

