The Shroom Sentinel was created out of thin air. I wanted to draw a creature, but I didn't quite know what. I remember I had my Shroom Forest file open and I took a look at the giant mushroom on the left. I decided I wanted to make a shroom monster. The Shroom Sentinel's characteristics were based off of different types of fungi. The yellow ones on its ribs and the blue frill on its back is based off of Bracket fungi, the pink gooey ones is based off of Slimy Waxcap, and the green ones on its back is based off of the Parrot Waxcap.
It is called the Shroom Sentinel because its purpose is to watch over the delicate ecosystem of the Shroom Forest and prey on any potential intruders.