Oh, dreamscapes... As a mage back home, she has a lot of control over and awareness of her dreams. That being said, Morrigan has not led the best of lives up until being forced to leave her home at the start of Dragon Age: Origins; most of her memories are all about trials she grew up with experiencing as games. Yet this isn't the first time her memories have been used against her; she'll be aware that it's just a dream and be absolutely livid about it. She may even attempt to shift the memory to something else entirely, so if you want your characters to see multple things from her past, we can totally play it as such!

A breakdown of most of those I can offer are:
1. Memories of the past. The biggest one here is running from Templars. To her, it was a little "game" that she and Flemeth would play when someone had found them. There are three options:

A. "Hide" and Seek When she was still a child, Morrigan would run through the Kokari Wilds and scream for help, luring the templars from the chantry further and further into the forest... where her mother would be waiting for them.
B. (Content warning: Body horror, death.) When she got older, around the age of twelve, she started confronting them as well. If they did not listen, she would control the roots and vines of the forest to entrap and crush them, some evenpiercing their armor and tearing them apart from the inside. Instances like this are the only time she received praise from her mother.
C. The little girl with the golden mirror. As a small child, she snuck into a neighboring village and stole a handheld golden mirror from a noblewoman before running back into the wilds. As one can imagine, Flemeth was Not Pleased.

2. Memories concerning her fellow Companions. From all her banter with the others, sitting by her own little fire isolated from them, the Darkspawn attacking the camp, to teaching the Warden how to shapeshift. There's plenty to go with here.

3. The Blight. (Content warning: War, pestilence, violence against women.) While it is the shortest in history, so many things went wrong between the day it started in the Kokari Wilds and her canon point towards the end. The inane civil war started by a betrayal and death of a king, chaos among the dwarves at the death of their king, werewolves seeking vengeance against a Dalish Keeper and his clan for their curse, a Circle in disarray as corruption oozes out of the cracks and abominations torment the survivors, tending to the wounds of the only two Grey Wardens remaining in Ferelden. The worst, and the reason for the third content warning, being broodmothers. ...Don't google it. Spare yourselves.

4. Sloth's Domain. (Content warning: attempted mind control, physical abuse) Remember how I said that this isn't the first time her memories have been used against her? Yeah, this is where it was in canon. Being trapped in a demon's domain, trying to break free on her own and being incredibly annoyed by the terrible impersonation of her abusive mother.

5. A conversation with Alistair. This is, essentially, her canon point. Talking to Alistair before she approaches her Warden and boyfriend to suggest the dark ritual ending. Mostly because she herself is conflicted about it because it's what her mother wanted and why she sent her with the Wardens.

6. Flemeth. (Content warning: Abusive and overall bad parenting.) Just Captain Janeway Flemeth belittling her for caring about others, how she's letting herself become weak for opening up to people and not pushing them away. "Love is a weakness" etc. Unconditional love? What's that? Something she never had until suddenly Warden Amell tried to share what it's like, and it terrifies her.

Overall, I'm pretty open to whatever others want to see of this. If some things are too heavy, let me know in advance and I'll have her shift the memories before they can get too bad or too graphic. Dark fantasy games, amirite?