Four Legged Tyrant Bull!
With the key to restoring his power in hand, Lin Mu pressed on, his will unwavering. He concentrated deeply, channeling the rampaging energy within his body into the illusory form of the Tyrant Bull.
MOOOOOOOOO!
The Tyrant Bull's bellow echoed through the training hall, a triumphant cry that resonated with Lin Mu's determination. Its spectral form grew more defined as it absorbed the essence. Lin Mu's left arm, previously engorged and swollen with power, returned to its normal size. In its place, the Tyrant Bull's first pair of legs fully materialized.
It had reached the Two-Legged Bull Stage, signifying a breakthrough to the Fourth Tribulation Stage of the Immortal Realm in Lin Mu's Tyrant Bull Marrow Secrets. The progress invigorated him, but he knew there was more to achieve.