Question about OML Logan's Fury Special.

So on OML Special "Logan's Fury" it says "While claws out, apply trauma." How does it work exactly? I have it Claws out special Lv. 7. Does it mean I have to use Claws Out special first and then Logan's Fury special for it to work? Or does it mean I have to have Claws Out special available for use but instead use Logan's Fury first?