Been struggling to get the blue shards, so I am wondering what I'm doing wrong. I assume I just need to defeat bosses, but I've defeated several and I'm currently stuck at just two. Do I need to defeat the boss while I'm currently in their corresponding biome? Do stronger bosses have greater chance to drop blue?
I'm trying not to spoil things and be as vague as possible but I'm just very confused on what I'm doing wrong.