Baldur's Gate : The Sword Coast Chronicles : NWN2 Persistent World

So... Rather simple question.

1: If i summon the undead from "The Dead walk", either the lv 12, or 21. Can I...
2: ..Use any negative energy blast, to heal my minion? Utterdark, Negative etc?

I'm asking because I recall in ages long ago, I tried using Utterdark in Jegs on undead, but it was able to damage them, even if it was negative energy.

Unless it has been changed recently (talking the last three months) no you can't. It works akin to having negative energy on a weapon, which also doesn't heal undead. There is a difference in the engine for reasons beyond me >.>

I thought it was supposed to be added? Was there a problem with it?

It could have been changed or I could be wrong, it has been a while since I played a warlock