This is an icon as part of the rewards from Patreon. For Martin Segundo (or jijiu1 on Furaffinity)
Are those kind of characters that I can imagen if they lick someone, they'll spread of radioactive stuff or are very poisonous.
And if you want to support me on Patreon, check the amazing rewards I'm giving:
You can get monthly rewards as icons, sketches, telegram stickers, or even free digital drawings, besides having my pictures in their respective full resolution versions.