The problem is that the only Light Energy that can fuse with Spiritual Sense is his Ultimate Light; other Light Energies still can't fuse with Spiritual Sense.
Even the Spirit Forging Level Light Energy of the Evil Spirit Token doesn't work; only Ultimate Light can achieve this.
Moreover, when Spiritual Sense and Ultimate Light fuse, one portion of Spiritual Sense requires one portion of Ultimate Light. His Spiritual Sense is sufficient, but his Ultimate Light is inadequate; squeezing out all of the Ultimate Light is only enough to use Spirit Light Unity for a few seconds, and the Ultimate Light in his body is completely drained, not even having time for conversion. This is still under Li Xiu's control of Spiritual Sense; if he were to fully unleash Spiritual Sense, the Ultimate Light might not even last one second.
