It's simple; abuse the Madness mechanic.
===Mainboard===
Vampire Hounds, Wild Mongrel, and Tortured Existence are profitable discard outlets.
Basking Rootwalla, Arrogant Wurm, Gorgon Recluse, and Grave Scrabbler are all very good Madness creatures, while Dark Withering and Call to the Netherworld are mana-efficient removal and recursion spells respectively.
Rancor and Vines of Vastwood because every green pauper deck should.
===Sideboard===
Aerial Volley to take out Delver and aggro fliers.
Brain Gorgers is another efficient Madness creature, but the easy counter makes me cautious of running it mainboard because it provides aggro and creature-heavy decks with an easy out. It'll be sided in against less creature-heavy strategies like Delver, MBC, and mill.
Naturalize because, well, I'm sure there are a few good targets in many decks...
Sign in Blood because I feel like this deck needs a bit more fuel. When there's no such thing as a dead card with Wild Mongrel on the field, even drawing extra lands seems good.
Devour Flesh was an on-color card that I had in front of me. Whatever man, stop looking at me that way.
