Not sure how to tag the arteficts at the bottom of the picture, it looks like this is an extended version of this one:
https://www.pixiv.net/en/artworks/135779976

Is it a cutout of a card without its background perhaps?

grpg said:

Not sure how to tag the arteficts at the bottom of the picture, it looks like this is an extended version of this one:
https://www.pixiv.net/en/artworks/135779976

Is it a cutout of a card without its background perhaps?

That's a common artifact of tiled upscaling. And based on the dimensions I'd wager it's an upscale of a generated image.