The first major challenge that Rudra faced was not in omega but in real life.
With the sixth system update , there was an opportunity to have subsidiary guilds , this new system was beneficial in creating foreign presence and Rudra wanted to merge the Grey international main guild into his banner for this very reason.
Rudra wanted to have a stronger presence in the Ghost kingdom and use its geographical location to launch three pronged attack on the Nineclouds kingdom.
With the war with Nineclouds royal army , just around the corner , if Rudra could add the ghost kingdoms front to the equation , then he could potentially launch a three pronged attack on the territory making it very hard to defend.
Rudra was initially confident that Ethan Grey would definitely agree , since he was the sole owner of the grey international guild. However shockingly Ethan refused.