Accumulates experience as you complete Dungeons, Battle Arena and Bomber Royale matches. When fully charged it produces 100 Forge Fragments.
The Forge Fragment Formulae is a legendary tome that can be obtained as a rare drop from Lesser Geodian Topside Caches. It produces 100 Forge Fragments when it is fully charged. Unlike Common Tomes (that can be used repeatedly without cooldowns), Legendary Tomes can only be used once a week, although they provide more rewards than Common Tomes per individual use.