This secret spell in Black Mifeng is insane as it can more than double your damage. When you activate it. You do lose all your mana and access to other powers, but in exchange your damage is significantly increased based on your max mana. So the more you have, the higher the damage. And if you use the Gore Idaho with spirits, put the stuff down and then use the ability, the damage you get is really crazy. So to get this spell in Chapter 3, from the north shore of the Bitter Lake, go to this orange red building and help the NPC close by. Talk to him a couple of times and then go to the forest Felicity Shrine. Run up the mountain like this, and then when you see the Tori, like this, go left. Down, down, down here. We’ll find a new shrine and close by the person you just helped. Now use the ring of fire ability to help him again and then talk to him again. Now go back to the forest Felicity shrine. Go down like this, make your way to the left, follow the path, and then jump down here. There’s a tree branch bridge. You can now reach the boss arena. Clear the boss and the spell is yours.