The artwork is up on my shop! It’s available in all kinds of formats like poster, print, phone case or mousepad.
https://www.redbubble.com/shop/ap/133526171

you can also support me and get access to the HQ png file by joining my patreon!
https://www.patreon.com/posts/dragonoid-dai-no-75234479?utm_medium=clipboard_copy&utm_source=copyLink&utm_campaign=postshare_creator&utm_content=join_link