Actually, we had a 30 with this theme....
Only, it got to 101.
What about simply adding these to that list? (Also, some of these are duplicate of problems on Scras' list).
Minor issue: legionnaire's disease is caused by a bacterium, not fungus.
With the right kind of players, this can be an interesting plot hook.
Though, the mechanism of wish-granting could be subtler in some instances - at time it reads like a marketplace ("What does a leg get me?"); also, I can envision it sticking longer to one wishing person who has a great dream, helping him but consuming him in the end.
Plot hooks are good.
All in all, a good sub.
Rather than painting a picture, it throws up questions.
As for their dimensions, they'd have to be disproportionately thicker than a simply enlarged human, as strength of bone increases with its cross-sectional area, but the burden placed upon it with the volume of flesh. Hence, why elephants are so stocky.
While quite single-minded, with a sole purpose, sole course and thus sole dimension, this is a very tragic character - and may even be suitable as a protagonist if one adds a desire to combat the madness and goals beside killing.
What you might add are details of his schemes, how he goes about his quest for vengeance, for personally hunting a cult spread amongst the stars is stylish, but ineffective.
Well, DnD is full of trap-creatures like mimics, man-eating walls and floors and pants that are basically defeated by one roll to "sense whether there is something amiss" - if you don't you're screwed, if you do, the trap-creature is a sitting duck.
Thus, I suggest re-making the bush into something more original. Keep the name, but perchance... what about a sentient labyrinth of shrubberies, for example?
So far, a 2/5.