Yeah, it's a Level 3 upgrade button, heavily inspired by the Druid of the Claw and Druid of the Talon upgrades. Meant for the Zergling unit (yes, I know it doesn't really have 2 little claws by it's main ones and it's armor isn't quite so segmented, but it's an upgrade).
Less orange and either get rid off those black outlines or insert them everywhere. Don't need em there on the claws. Although black outlines are warcraftish They do not fit there. Good work otherwise! Back claw looks awesome.