Alright, as the title suggests, this is an RP that will be focused on a Custom Space Marine Chapter that I'll be making. The idea is that this is an Ultima Founding based Chapter so the majority of the Astartes within its ranks are Primaris Marines. The idea of this RP is to essentially write a story/fanfiction together about the Chapter's founding and first Campaign/War. The main story would focus on this new Chapter having to secure a system near the Great Rift (as with many of the other new Chapters), however, unlike their brothers, they have to liberate their world from the foul Green Skins, while also having to battle off potential Chaos raiding parties that emerge from the rift. Basically, its a way for the players to become the heroes of this new chapter... this new chapter will be featured in a novel I plan to write in the future for Black Library, and with your permission will include your characters as mentioned heroes or cameos in the story as they will serve as the "Command" ranks; due to it being a relatively new chapter and all it would make sense that they'd be the Captains and Veterans of the Chapter. And yes, if this does muster up a fair amount of support I'll start working on the Chapter and post all the details below. If we get a good thing going I'll even commission an artist to draw up what our Astartes look like! Anyways, looking forward to hearing from you all!