Absolutely no need for apologies! I'm thrilled you're interested in using my spell icons for your game.
Yes, they are entirely my original creations, crafted with the magic of AI (Stable Diffusion 1.5, to be exact!). While I'd love to see them featured on EpicStore, itch.io, Steam, or any other platform, it's a good idea to double-check each store's rules as they might have some specifics about AI-generated content.
Feel free to give credit wherever you use them - I'd appreciate that! If you have any more questions or need further clarification, just let me know. Best of luck with your game development! 🚀