You must perform Weapon Skills and Skillchains on monsters that con Easy Prey or higher.
You receive 1 point for opening/soloing a weaponskill, 2 points for closing a Lv.1 Skillchain, 3 points for closing a Lv.2 Skillchain and 5 points for closing a level 3 skillchain.
You must accumulate 300 total points.
The latent effect will dissappear regardless of whether you unequip or not. The effect given will go away, eg. ice +10 will be in effect until weapon is finished, the ice +10 will go away when the latent is broken.
Once you no longer receive the latent effect bonus, head back to Norg and trade the Tachi of Trials back to Jaucribaix, who will take the weapon from you and give you a Map to the Annals of Truth (key item) and tell you to head to Kuftal Tunnel. IMPORTANT NOTE: The latent effect will NOT disappear from the Tachi of Trials' item description! You will know the Tachi is 'clean' when you NO LONGER RECEIVE the bonus, e.g., when you equip it, your Max HP will not rise by 20.
