Before now, Max had no offensive techniques to use in a fight.
The best he had was Inversion and that was still quite lacking.
Having broken through to the realm of Venerable, he could feel a qualitative leap in strength.
Not only that, he felt like things that had troubled him in the past wouldn't affect him so much now.
With Ryuk's skills, he was already close to breaking through to the next level.
Of course, his body was still adapting to the sudden change and his mind was slowly opening itself to the knowledge gained while pushing him closer to enlightenment.
He could sense that just as close as a breakthrough was, it was also quite far away as well.
"I need to take my time to gain enlightenment before attempting another breakthrough."
Even though he had gained Adaptation and Comprehension, that only made it easier to accept Ryuk's powers and not shake his foundation.
That way there was no need to worry that his foundation would face problems later.