Your armor or your weapon? [Lloyd's about to ask what good that would do, but when he thinks about it, he has seen a weapon with an Exsphere attached. The memory makes him sit back, rethinking the differences that might not be different after all.]

Not everyone with an Exsphere attaches it to themselves in my world, either, but I think it's more effective if you do. I guess your way would be a lot safer, though. You wouldn't have to worry about what would happen if you didn't have a Key Crest attached. No one would turn into a monster because their mana went out of control.