Feel free to credit me for the small edit. It looks good in game but I use a lighting script that makes these look workable. If you aren't using a lighting script or you are in a bright cave, I recommend using shadows. I might edit this at some point as the spikes seem to point towards the screen instead of down and away as they would be oriented based on the original tile.
I'll likely be doing a few edits here and there so I will just update this thread.
*Cough* appropriate license *cough*
Licensed to all users for both commercial and non-commercial use. Credits to Kadokawa and Enterbrain. Use requires that you own a legal copy of RPGMaker MV and any of the affiliated resources herein. (Figured I'd actually spell out the license)