I'm not a fan of depicting acts of cruelty themselves, so instead I settled for a villain that is cruel in every sense of the word.
Say what you will about Infinite and his backstory — I'm fully aware that the day 15 prompt is Weak — but the atrocities he undeniably committed in Sonic Forces were pretty cruel for a Sonic game (not counting that one time Mephiles straight up murdered Sonic since that timeline has been erased). And it's all thanks to that evil Phantom Ruby.
I also dropped the Instagram filter preset I've been using for this year's Inktober pieces in favor of using just the built-in editing tools. The filter was blowing out most of the lighter strokes, so hopefully this looks truer to life.
I still don't know what I can do to make the paper uniform and free of shadows without putting my sketchbook in a scanner (I currently photograph it under a dedicated LED lamp), so any tips to that end would be helpful.