you have to change the splat too, otherwise it just looks like a blue tree on grass. And i'm pretty sure the corrupted trees had darker purplish bark too. there's also a lot of minor details missing in this that are present in many corrupted units, i suggest you have a closer look if you're seeking to polish it off and get good feedback.
Overall it's a nice idea, but i think you need to work on this just that little bit more, so keep at it!