Hi RJ,
Would AI-generated SVG artwork be acceptable for your app? I use OpenAI Codex to create editable vector artwork, and disclose that workflow. Here are examples from my existing woodland illustration pack:
https://ithyme7.itch.io/quiet-winter-woodland-portfolio
These are woodland illustrations showing the vector style, rather than previous fantasy-app commissions.
If that style and workflow fit, my indicative price is US$25 for one simple static fantasy item icon: an editable SVG, a transparent PNG at an agreed size, one consolidated revision, and nonexclusive commercial use in your app for the rights I actually hold. I would not promise exclusive copyright or a copyright assignment for AI-generated work.
I can review the brief now. We would agree the exact asset, references, dimensions, price, rights, payment terms and delivery date before work starts. Which single item would you like to begin with, and what visual style are you aiming for?
ithyme7