When Adonalsium shattered, did the Shards then inhabit pre-existing worlds or did they create a world to inhabit?
Also, is it important that certain shards ended up in the same worlds, e.g. Preservation and Ruin?
Finally, is it easier to pair shards if they are opposites, again such as with P&R=H, and if so would that make Odium's opposite a target?