Warwick Quote Suggestion.
I'm just here to put down my thoughts. Correct me if I'm wrong, but I have a feeling that Warwick and Singed will be enemies.
"Subject wailed and pleaded. Insisted he was no longer a monster, but a good man. Ignored the distractions and threaded lengths of delicate hoses throughout his extremities, splicing them with his veins and arteries. The subject remained conscious and screaming for six hours."
Just a hunch.
"Found subject despondent and shrinking at the slightest gesture. He struggled against his bonds as the delivery chamber filled with the transmutative formula and activated."
Anyway, Warwick is obviously going to have some kind of special quote to Singed, and I have a suggestion. Don't make it some snappy insult or threat, like when Renekton talks to Nasus or something. No, make it literally just a screaming howl filled with nothing but rage. No words, only hate. I think that would fit the relationship best (unless I'm misinterpreting this lore or something).