Powers

So I have a character who has powers of shadows and darkness. Yes i know it sounds edge lord. It's intended to be. The character wants to be a knight in shining armor and hates having their powers be like that. Knight in shining armor is a character style not powers. The hero everyone looks to who can win on their own

I am trying to think of creative uses for the power.

Rules for the world/power. Shadows are both the darkness lack of light but also a connection to a world of shadows. They're a portal to a gray scale mimicry of the world. Traveling between the world's is normally impossible but power and authority for the character change it. In the shadow world there is a metal, as of yet unnamed, that can pass between the world's easily. It's used for a different connected story but is important to mention here.

If anyone can think of unique ways to use the shadow, shadow portal/world, or shadow metal please let me know. I have a few but looking for way more

Edit: for clarification. Shadows and darkness are not evil in the verse. They are not bad. It's character flaw that the character wants to be shining symbol. Hero complex vs emo phase type thing