The only reason why Rhash thinks Reif was as strong as he is was the latter's concern
Reif can feel how pressured his big brother was. Every time that they sparred and Reif won, he can see how it heavily affected Rhash
Of course, Rhash was delighted to see Reif improving his power. However, it also brought a heavy mental burden on him
Reif would always see his brother putting an even greater effort into his training every time he loses
Hence, for the sake of his big brother, Reif decided to simply hide the real extent of his powers
Even he was surprised at how strong he becomes easily. Simply using his innate chaos power was enough to leave other people in the dust
His speed of improvement was simply astonishing. If this goes on, even if Nath were to gather his allies, he might still easily lose against Reif that is set on killing him
Despite seeing how badly beaten Nath already was, Reif doesn't have the intention to stop
