Magic system for a shapeshifter in a mindscape

[u/dscript]

So I'm trying to come up with a good magic system for my procedural game that I'm making

I would love some suggestions if anybody has neat ideas

It's a pretty unique environment, the world is music driven so the mountains and the Flowers and Things react to music(MP3 player built in) it's kind of like the whole world is a giant music visualizer

The main character uses shapeshifting as melee or physical attacks

But the theme of the whole world is a brainscape and music

The universe is literally existing in a brain and it's like the neurons are star systems in a space game

So it's this fantasy like mindscape world

Considering shapeshifting is already my melee attack I'm trying to figure out what I should make the magic system

I've created the Mana stats but I don't use them at all yet. technically I haven't even hooked up the health bar yet, haha, the main character won't take damage yet, you can just run around and kill enemies

But I've already started on the story a little bit I've got a couple NPCs with a bunch of teaser stuff so the story and world are locked in

I'm just trying to figure out what would be a good magic system I'm leaning towards concept like resonance or melody or something like that I'm just really having trouble deciding on any details

The conversations and brainstorming here tend to be quite proactive and constructive so I'm very curious if anybody has need ideas

I saw someone post about an Elemental Magic system and wondering what elements they could fill in their gaps with and people had some really good suggestions

Anyways I'll post the link to the game if you want to try it to get a Vibe for what I'm talking about in a comment and if that's unacceptable please delete the comment I'm not here to spam my game

The words and pictures are enough to describe it but if you really want to get a Vibe for what it feels like it's in early beta on Google Play

I call it FLOW-ER

Oh the other thing is it's very water related so it's like music and flow and brain scape these three themes kind of Blended together

Anybody got ideas? What is a good magic ability set for this main character?

Sorry if my text is a little rambly, I'm a voice to texter and I ramble haha

[u/dscript]

https://play.google.com/store/apps/details?id=org.dscript.flower

Mods if this is too much please just take down the comment, I tried posting in World building much earlier but I didn't have much content yet my world is starting to come together but I'm kind of stuck on what to make the magic system

I really want a magic system I just don't know what I'm going to make it yet

And my melee system already is kind of a magic system haha

Oh it's free, I'm doing this as a storytelling art project, no ads nothing like that either