Fili-slash both represents Collector's power (considering it's a weapon usually reserved for a juggernaut), as well as his general fighting style where he throws punches and kicks. (Also the blue energy and floating fit Collector too)
Energy sword represents the Sword of Creation that Collector wields. Similar to the real thing, it's actually not intended to be used very much, as your other abilities are generally stronger.
Percutiens represents Collector's Creation powers, and just generally fits him with the quick and powerful lightning.
