Just have her kill them

“Now it’s going to be confusing if I keep referring to you as daughter, so I’ll be referring to you as Angel” you explain to her “and more importantly I now grant you power in the **** unmatched by even your mother. Now though your family will interfere, they must be eliminated”

At this news she made a hand gesture as she summoned golden flames which burned brighter than ever before. Then she extinguished it “thank you Master, I assure you they will be dealt with”

It was with that she floated two feet off the floor (did she have that power before? Well she did now) and began to glow with golden light. You decided to watch from afar with your godly powers as you saw your newest **** arrive in the temple of Mortis. In there you sensed the old man the father and the dark lord the son, and your newest **** entered.

“Ahh my dear sister did you manage to catch our little intruder” mocked the son. The father however was skeptical.

“My daughter I sense there is something different about you” her ‘Father’ asked concerned.

“Yes I have found a new purpose, a new Master” she said “and I know that I will no longer be a **** to you”

Before either the son or the father could respond she had unleashed a wave of angelic light from her pinning her family to the walls of the temple.

“Daughter what are you doing?” demanded the father to which Angel responded with slamming him again against the wall.

“I am no longer your daughter, I am Angel and I have been freed of your influence” she said her voice carrying an element of danger to it.

“The intruder he’s done something to you” he father choked.

“YOU ARE NOT FIT TO MENTION HIM” she growled before unleashing a maelstrom of light that destroyed her father. Then she sharply turned to her brother.

“This is a day I had waited for some time” smiled her brother “gone is his restrictive influence, and to think it was you dear sister that removed him. Now together imagine what we could do”

“I seem no alliance with you brother, I seek your **** also to bring Master the servant he deserves” she reminded him.

“Sister our father is one thing but I’m on a different level” he said chuckling darkly.

“Then it is fortunate that I exceed even yours brother” she growled before mercilessly unleashing a wave of golden fire while her brother did the same with purple lightning. The result was something akin to a Harry Potter duel, one that was the son was losing badly.

“Sister if you kill me then you’ll through the **** into chaos” he pleaded now understanding how badly outmatched he was.

“I believe that is my Master’s desire, to have the light triumphant. And to be fair you were always a pain in the ass” she replied mercilessly before incinerating the son. Jeez that was almost too far but still she had impressed you with her loyalty. As such you walked into the temple and upon seeing you she bowed deeply.

“It is done my lord” she said, her voice carrying a sense of her duty.

“Excellent Angel now we should head back home, I’m eager to see what Soraya has done in my absence. She’s my assistant for a planet that will be filled with my slaves. We are building our base there” you explain, conjuring a space craft from thin air.

“I’m excited to see it Master, an army of the light side is exactly what we shall need” gushed Angel ready to serve you.

A/N: welp you just threw the **** into chaos and ensuring that all is out of balance. Hooray.

I decided to name the daughter Angel seeing as it may become complicated if I refer to her as the daughter all the time.

Also feel free to provide suggestions for what the Slunni make your planet and for what you should do after you return to your planet.