Golgoth eyes widened in fear, and Rowan could see the disbelief inside them, the Reflection had seen his power but he could not understand how deep it went. Rowan's strength did not just come from the powers of his flesh, which was quite substantial, but also from the fact that he was a dimension.
As a mortal, he could not yet access all the powers from his dimension, but the thing he could briefly access was his weight.
Although the passive field of energy around his body made Rowan virtually weightless, if he wanted he could access his true weight, he had stopped measuring when only his arm weighed a quintillion tonnes. How can you measure the weight of a dimension? And not just one dimension but three dimensions in one, because Rowan had preserved his first and second-dimensional body.