User blog comment:Commander Marko/Cygnus, The Galactic Magus/@comment-3971604-20130903045520/@comment-3971604-20130903195004

Honestly you could do both. Have it to where when he kills a minion or monster he gains X amount of dark matter. Champion kills/assists are double/triple this amount. And still have a passive regen mechanic. Your other option is make it on Auto attack regen instead of minion/champion kills "your next auto attack after using an ability restores X Dark matter." or just put that on a skill itself to help regen more. Just some ideas :)