Materials and rewards

Reinforce Item

If you're lucky it will add a new bonus onto one of your items. (up to a max. of 4 bonuses)

Sources

Event Chests Moonlight Treasure Chest↗ Other Chests Text Stone Chest (Lv. 1-20)↗ Other Chests Text Stone Chest (Lv. 25-35)↗ Other Chests Text Stone Chest (Lv. 40-65)↗ Other Chests Text Stone Chest (Lv. 70-80)↗ Other Chests Text Stone Chest (Lv. 85-90)↗