No idea how one would get it in MidJourney, can't even get it in regular Stable Diffusion, at least far as I know. Seems to be specific to ClipDrop, just select Fantasy Art from the style icons after you type your prompt when generating anything there using Stable Diffusion XL. The default is a little button thingy marked No Style, click on that and the icon menu pops up showing -- yeah, I know :-) -- birds in various art styles. Click the birdie of your choice, then the Generate button. 

Pretty sure it's ClipDrop specific, tried the same prompt that gave me lovely ginger dragon kitties there over at Nightcafe and their version of fantasy art mix is nothing like it. All Thomas Kincade studio in that style, and this is most certainly not Kincade-like. Don't think it's that other guy either, you know, the one whose name must never be invoked. I suspect it's a blend of various fantasy artists but no luck so far in identifying any of them.

And, not really random. Clipdrop's fantasy style gives that sort of brushwork nearly all the time. Here's a cute cat in a rose garden (yes, that's the entire prompt) with the fantasy art style applied.

No fixes used on any of these, that's straight out of Stable Diffusion XL.