Too Weird To Live, Too Rare To Die

Sequel to Soul Shards, preferably read Soul Shards before this, even the description.

Everyone is crushed with what happens with Abby. Ross especially, she left a hole so big he finds no room for new love when everyone around him can. Some have moved to a life away from Oderrus, to be normal (but still in the Yogscast and Hatfilms). But are called back when something so unexpected happens they drop everything and run to the tree. A mysterious character, Unknown, visited Abby. Who is Unknown and why were they there, is it a relative she was not aware about or is it someone more powerful than Lilith.