MagiStream

Like, do you want to just post the link to the piece, or a link that shows the image itself?
If it's the former, just go to the picture you want, copy the url in the url bar and then past it and bam, direct link.
Like this-
https://www.deviantart.com/icypheonix/a ... -742579299
If you want the latter, so that it links an image, then you right click on the piece and select 'copy image location' and then paste the url inside the image tags, like so

And if you want it the image itself to link to the posted piece on your account, then just add the url tags around it and put in the link you want, so it would look something like this-