Destiny 2 Lore - Why was Osiris a Dawnblade and not a Sunsinger? How do subclasses work?

In the first Curse of Osiris cutscene Osiris is seen using the Dawnblade super. In the lore he is often assumed to be a Sunsinger. This raises the question of how do subclasses work and to a greater extent, the light as a whole. This video hopefully sheds light on this topic. Subscribe to My name is Byf: http://www.youtube.com/subscription_center?add_user=reachforgenetwork Support my lore content on Patreon: https://www.patreon.com/user?ty=h&u=2961923 Join the community in my Discord Server: https://discord.gg/s8dwrmz Check out my channel: https://www.youtube.com/c/MynameisByf Follow me on Twitter: https://twitter.com/mynameisbyf Like me on Facebook: http://www.facebook.com/pages/RFN-Reach-Forge-Network/253992467978121