Peasant EDH is an EDH variant. Your commander is any uncommon creature (does not have to be legendary!) and every card in your deck must be common. (Some players use printed rarity, rather than Gatherer rarity. That opens up a few options from Antiquities.)
One of my favorite decks ever. It's not complicated, but it's a blast.
The goal is straightforward: Resolve Kavu Predator, hand out life like candy, and kill opponents with 21 points of general damage in the combat step. The predator has built-in trample, making it an ideal stupidity delivery system.
However, the deck is deceptively controlling. It's loaded to the brim with an assortment of green counterspells (e.g., Withstand Death, Avoid Fate, Ranger's Guile) to protect Kavu Predator. You'll often spend your first few turns sculpting your hand. It's important to mull aggressively; ideally you'll start the game with either a few protective spells and a way to give out a lot of life, or some card filtration and at least one card that synergizes with Kavu Predator.
While this deck can absolutely have some explosive turns — I've killed a table of normal EDH decks (not deeply competitive ones, obviously) by turn 5 off a strong opening grip — it usually needs a few turns to breathe. It's also incredibly reliant on Kavu Predator; there's a handful of fat cards as a backup plan, but they're not ideal. (Not even close to ideal, really.)
Generally, unless you're confident or just feeling punchy, casting Kavu Predator on turn 2 is a mistake. At 3 or 4 mana, you can run it out and protect it, and you'll rarely need more than 4 or 5 combat steps to seal a game if you're careful and prudent.
Some notes:
Don't sleep on some of the weird cards in the list. Some gems:
Matsu-Tribe Sniper and Elvish Hunter can really flummox some decks. They're surprisingly good at blunting certain kinds of finishers.
Healing Leaves looks like absolute garbage, but it's surprisingly decent. Not only will it get you over the 20/20 hump when combined with Reverent Silence or Hunters' Feast, it can keep your Kavu Predator alive on turns where you need to fight and attack with it. It also messes with combat math, an important part of the mind games of this deck.
Lace with Moonglove can provide surprise kills — with deathtouch, Kavu Predator can assign a single damage to anything blocking it and spill the rest into the opponent via trample. The threat of it can force your opponents into bad decisions, like unnecessary gang blocks. (For a green deck, this deck operates at instant speed a lot.)
Evolution Charm is a solid middle-tier card here — it ensures that you hit your 3rd land drop in a timely manner and it can pull back an annoying critter to gum up your foes. But one of its best functions is giving your foes a flying creature — yes, really. There's a lot of anti-flying tech in the deck. While reverse 2-for-1's aren't exactly a winning strategy, it's an option that's kept me in more than a handful of games.
