Spellthreads are tailor-crafted augments that grant caster-class bonuses to leg armor. Like other augments, applying a thread will overwrite another augment or enchant on the item.
The Burning Crusade expansion is required for a tailor to craft spellthreads, but non-BC players can buy and use the threads on their equipment. Most tailors will only be able to craft 2 of the 4 available threads, because they must choose between Aldor or Scryers.
|+25 Spell Power||+15 Stamina||Scryers||Honored|
|+25 Spell Power||+15 Stamina||Aldor||Honored|
|+35 Spell Power||+20 Stamina||Scryers||Exalted|
|+35 Spell Power||+20 Stamina||Aldor||Exalted|
Wrath of the Lich King expansion introduced several additional spellthread patterns.
|+35 Spell Power||+20 Stamina||Trainable||None|
|+35 Spell Power||+12 Spirit||Trainable||None|
|+50 Spell Power||+30 Stamina||Kirin Tor||Exalted|
|+50 Spell Power||+20 Spirit||Argent Crusade||Exalted|