If "Also, please, set as (...)" was replaced with "Also, please, would you set as (...)" it would sound more like a suggestion or request, to me it sounds like a decently polite order. If San had the same feeling, then no reason to be surprised of the reply.
About the icon itself, just like many people I do as well enjoy this theme of icons, they're so characteristic it's already obvious who made them!
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This looks fantastic.
The only way to improve would be to make a full icon set for a hero.
I guess one could compliment with the other icons like Poison Rain and Death Swipe, but I don't exactly feel the connection between. Maybe make the poison rain fall down with tiny skull-shaped droplets ? Or more interesting, make a variation of the Poison Rain = Death Rain or Fel Rain or Taint Rain ?