The Tyrant Bull Marrow secrets had 7 stages that conformed to the 7 stages of immortals.
Originally, Lin Mu was at the Third stage which was the Legless Bull. This granted him a strength equivalent to that of the Third Tribulation Stage of the Immortal realm as well as the ability to use the first innate skill of the Tyrant Bull Marrow Secrets, the Tyrant Lift.
But now that he was about to reach the Fourth Stage, the Two Legged Bull Lin Mu felt the spike in his body's power.
~MOOOOOO~
The illusory figure of the Tyrant Bull above him also started to change and released a tyrannical aura that cloaked it. A few seconds later, it had turned into a sphere around it and the figure could no longer be seen.
"That… that… I can't believe it.."
"Hurry! TAKE OUT THE RECORDING JADE SLIP!"
"We can't miss even a second of this. This is priceless information on the breakthrough of the Tyrant Bull Marrow Secrets."