Myconid

Myconids are the mushroom-people. Something quite well suited for your Mario-themed D&D game I suppose. They live to about 24 years of age, getting larger and stronger with each passing year until the ruler of a circle of myconids is about 12 feet tall. They do a good many things via spores, the main three being communication (initating a telepathing link with someone), alarm and reproduction. Older myconids can use their spores to pacify and cause hallucinations --essentially drugging the target-- and to briefly reanimate dead bodies as vaguely fungoid puppets. Eventually the eldest mushroom-man is able to produce potions, which I like to think is actually some organically generated goo rather than something from a cauldron.

So I guess if you do want to use these guys for your Mario-themed D&D game, having an older myconid around can really give it more horrifying angle.

I like mushrooms. They're a delicious piece of not-plant. I also like how weird they look; there are some that you could look at and be astounded to find that they are, in fact, a mushroom. All of the myconids in this image take inspiration from different kinds of mushroom, varying in crazy looks and deliciousness.