I.have this theory
Van Durce told Gardon that he lost the emperor's trust and stripped of all.his influence and power.
But suddenly, Retka rebels on orders from.Van Durce who promised Retka the Golden Guard's support and.lordship over.Toran and Pyrru. Yet Retka failed and killed by Gardon.whom, ironically, became the King of the united Toran.and Pyrru kingdoms and increased in power. I think Van Durce did all of this to.help.Gardon grow in power. Every obstacle he laid to.Gardon helped him become more powerful.than.before. And as we see what Van Durce says about Gardon.at the end of chapter nine, he probably suspects the.emperor corrupt and needs Gardon's help without giving him his support directly.
Van Durce wants Gardom on his side but he is playing his cards carefully.