From TheWarWiki

Tome of Knowledge unlock for Dwarf.

Enter a Dwarf Scenario.

This unlock is achieved by entering the Gromril Crossing scenario. Gromril Crossing is associated with Kadrin Valley, and can only be entered when that zone is contested, which requires Destruction to control and lock Thunder Valley.

Rewards

• Title: Foe of the Dawi
• 336Xp