Use Google to search for images with high resolution. It is the best source.
I tried but with no result for a high resolution version of this image..they were all used in marketing articles.
Nice image!! Maybe you can get the image or the artist info if you go to
https://images.google.com/ and just drag and drop the image you share in your post.
Hope it helps
After some research I found it belongs to the game spells of genesis (a blockchain game). I will contact them, hopefully they will reply and sent me a high resolution version of this image.