New Mob for the Mushroom Fields

I had an idea for a mob that could inhabit the mushroom fields and be dangerous only in the way that pufferfish are. This mob is the Sporecupine (Spore Porcupine). It would wander around the mushroom fields lazily and sometimes climb the tall mushrooms. They can also fall of the mushrooms; inflicting damage and poison if they land on you. They are fairly easy to spot on a mushroom though, so I am not worried about that. They also will deal damage if you step on them or run into them. They would probably drop spines, if anything, while would act like poison arrows. I hope you like this idea! Leave any suggestions in the comments down below.