Equestria is full of ancient and powerful pieces of magical equipment. The Alicorn Amulet is just an ill-conceived experiment by some old, forgotten mage. It's dangerous, certainly. But Twilight is careful.
It doesn't mean anything that Luna can't access her dreams. It doesn't mean anything that she can remember every detail perfectly. Twilight's dreams are just dreams.
She isn't seeing a figure in the corners of her vision. Her magic doesn't flash red occasionally. The whisper Twilight hears whenever she’s near it is just her imagination, or a side effect of a decaying spell.
Nothing bad is going to happen. She's only studying it, after all.

This fic is set after the events of season five, and will not follow the events of the proceeding seasons. Nothing against them, I just want to tell my own story and this was the best place to put it.

And yes, this is self-indulgent edgy garbage.