You must perform Weapon Skills and Skillchains on monsters that con Easy Prey or higher.
Weapon Skills performed while under Level Sync will count.
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.