Normally it's related to (or uses) some form of your Hissatsu. 
For example, if your power was to create fireballs like Gin the Siberian husky, you could fire a barrage of them at your foe(s). Or if you could make light arrows like Isamu, you could do a belly-slashing attack using arrows as a means of extra damage.
It just has to include your Hissatsu (or [i]battle[/i] item) in some form. That clear things up?