After Proximus died, a new cult formed known as the Proximus Cult. They originally formed in the Forest Union, but utilized cave systems to ambush multiple nations and yoink some land from them. Queen Ambystoma, leader of the Proximus Cult, wants to do better than Proximus. And they already are. Might have something to do with her IQ, maybe because she has venom (yes, 500 years ago a venomous and underground had kids which were her grandparents because these raptors live shockingly long), maybe because she's more aggressive than Proximus... I dunno.
