I always say this, when you want to show a picture from any image hosting site get the image address and not the page address.
Page address: http://k6666orochi.deviantart.com/art/Incineroar-685869923 (it won't work with the image tags)
Image address: http://orig05.deviantart.net/18af/f/2017/162/3/d/incineroar_by_k6666orochi-dbcckmb.jpg (this will work with the image tags)
How to get the image address:
right click on the picture - copy image address
(in case of DeviantArt, if you can download the picture, click on Download, then get the link from the Download page)