Residuum

Residuum was a magical substance that was left behind whenever a magic item was disenchanted. Some described it as concentrated magic.

Description
This substance was a silvery powder.

Varieties

 * Abyssal Residuum: magical residue left behind by abyssal magic.
 * Concentrated Residuum: a form of residuum that had been magically reduced to allow for a higher concentration. Some could be found in the Whispering Caverns.
 * Dark Residuum: the purified remnants of necromantic magic.
 * Fartouched Residuum: a residue left behind by powerful Far Realm energies.
 * Ostorian Residuum: concentrated magic left from the days of the Kingdom of Ostoria.

History
Following the Spellplague, a large number of shadovar sought to reconstruct the mythallar of Xinlenal. To achieve this they sought out magic items to disenchant for their residuum, then fed that substance through white-hot tubes of melted glass before dripping it on to the mythallar.

Usages
Residuum could be used as a generic material component substitute for any ritual.

Trivia

 * Rust monsters retained residuum within their bodies after eating a magic item.
 * Steel predators often had residuum in their bodies, as they delighted in eating items containing it.

Appearances

 * Video Games