What you have to do every day. Because the reward for that task can only be replaced by drawings, now the last BOSS of each FB will produce a jewelry drawing, but it is sapphire. If you think it's slow to change drawings for a task every four days, you can also make a broken necklace, which is the trigger task of jewelry, and you can do it indefinitely. You can also use Titan ore to grab 10 pieces of its powder for a mission item. Generally speaking, you start to brush advanced drawings in the early stage. By the way, every FB Hero mode drawing must also be brushed. In the early stage, you can earn G with sapphire, and in the middle stage, you can use OEM for more people.