Singed

the Mad Chemist

Tank

You mustn’t die yet; I have far too much to learn from your fragile anatomy.

The build that broke the game

Boots of Swiftness

Rod of Ages

Rylai's Crystal Scepter

Liandry's Torment

FN

Force of Nature

Warmog's Armor

Why it worked

The poison trail was free to run and pushed Rylai's slow onto anyone standing in it, so chasing Singed cost more time than walking away did. Force of Nature returned a percentage of his maximum health every second, and Warmog's made that percentage a huge number. Fling turned a gank into a kill without him ever having to stop and fight.