So my friend has the Spirit of the Vulture Warlock bond that he bought from the speaker and his changes colors from blue to purple. We both still aren't sure what triggered this color change but i usually notice it turns blue during intense battle. I unfortunately bought the white polygon construct warlock bond, the one that looks like 3 cubes or a giant engagement ring on his arm and I'm not sure if it has any unique features like my friend bond has but I haven't noticed it. Do any of you have Warlock bonds from the speaker and is there anything special about it? Can anyone shed light on why my friends armband changes colors and if mines has special abilities as well? There's very little to no info on these things on the Internet so far.