The earth can play a lucky role. Fire can burn wood. The dormitory is made of wood. There are many people. You can use fire wood. Whoever killed Wood brought it to you.
It's not good if you burn the wood to the ground, and your luck will get better, but you'd better not let your roommate know that you brought the fire crystal.
Let's just say that it is to weaken the opposite sex and weaken the academic career. Hehe, you should add points to adopt it.