In fact, Thunder Drake is trying his best not to unleash too much power with the golem because once his power output crosses the 99 C gap, he will be displaced to the second layer of space and will be easily ejected out of the realm into the void by the world spirit.
Despite him actively limiting the strength of the golem, if his two enemies could pressure him and dish back as much power as he gave to them, he would be in danger of crossing the threshold.
Fortunately for him and unfortunately for his enemies, the two gem kings were restrained and suppressed, so they couldn't display much of their power.
He was faster than they, and the fact that he didn't fight them head-on further made their power go to waste. He was like an opportunistic shark. He would evade their attempts to retaliate and instead use his advantage of speed to strike them where they couldn't block or dodge his attacks.
