D&D General Help with Beholder Eye Ideas

[Keaggan]

Hey all! I could really use some creative minds here.
I'm building a campaign around a cult that stole the literal eyes right out of the world's one and only beholder. It's a setting where there's only a single legendary creature of each type, so these eyes are a really big deal; each one is basically a unique magical artifact. The cult's priests each wear a silver-locked pendant containing one of the eyes, and the party will have to face off against these "minibosses" to reclaim them.
Here's where I'd love your help:

• - Which 6 beholder eyes would you pick (out of the classic options or your own homebrew ideas), and how could each eye's power shape the cult's vibe, the priest miniboss, and the quest to get it?
• - What are some wild, thematic encounters or locations that could be built around each eye's theme or magic?
• - How would you make each eye feel like a true artifact, full of lore, danger, or strange effects?
• - Any cool twists or traits for the cult priests so each miniboss stands out and feels memorable?
• - I haven't decided on the order yet, so I wanted to focus on which eyes would be the most interesting.

I want each encounter to feel dark or twisted, and I'm totally open to menessincing, difficult or off-the-wall ideas. Hit me with your best stuff!

 

[Savage Wombat]

Well, first, I wouldn't wear the eyes on a pendant. Each leader should have an eye grafted to a different part of their body.