Fourth Emperor

Bruce was extremely in awkward position as he has to fight a person controls time for his trail and it was pure abuse

it was like Childs play ,no matter what he did he was unable to land a hit it was like standing with no option.

This led to Bruce thinking of quitting. But he started using extremely strong attacks that

the fourth emperor couldn't avoid.

this made Bruce feel that in front of absolute strength all the tricks vanish. the only good part is that the fourth emperor inly has control of time and space.

It Took a total of 3 years to defeat this fellow and Bruce felt happy in the shadow realm for the first time.

after defeating he got power time and its usage experience

he was also fused with the leg of a abyssal titan.

this helped him improve speed and dodging ability.

but it would take a long time balance as it felt odd that one leg was strong but the other leg wasn't so this led to unbalance in fighting style

but Bruce felt happy that both will feel equal after the next trail.

So he took 8 months to control this power.

the trail is about gravity what they need is balance and it is what Bruce lacks the most after fusing of the abbysal titan leg in his right leg.