That is for explanations of time and sources and will not reveal a visible retcon. Canonically, the physical appearances and harnesses worn via the Elites and other species of the two the Covenant along with the Swords of Sanghelios in the course of the gatherings of Halo 5: Guardians https://loginhalocuan9808539.ambien-blog.com/34638836/details-fiction-and-halocuan-98