MAINBOARD
Creatures:
Stormbreath Dragon is a big body that can be an immediate threat and also can use up some of Xenagos, the Reveler's leftover mana
Polukranos, World Eater is there to be an undercosted, big creature that can use up extra mana left from Xenagos, the Reveler
Scavenging Ooze is there to help with lifegain and stabilization. It also makes more efficient use of all the removal that is in the deck.
Sylvan Caryatid is there for mana fixing as well as a good blocker for the early game
Reaper of the Wilds is there to be a versatile threat. It lets me scry, as well as is out of range of most removal.
Ghor-Clan Rampager is there for his bloodrush ability and it also combos really well with Flesh / Blood
Other Spells
The variety of removal in the forms of Abrupt Decay and Dreadbore are there to help control the game and kill off any threats that might be put down
Flesh / Blood combos well with all my big creatures and works really well with Ghor-Clan Rampager
PlansewalkersDomri Rade is there to help in the early game as well as helps me as a conditional removal option.
Xenagos, the Reveler is to help with casting large creatures and he also has a way to protect himself and his ultimate can help improve board state if the need arises
SIDEBOARD
Anger of the Gods deals with small threats to stall until I get big things out
Mizzium Mortars is there to deal with blood baron and as another form of early removal
Mistcutter Hydra is to help against blue decks and also to race against some other decks with big creatures. Also a nice option to bring in against control decks.
Slaughter Games is there to help against control decks to stop things like supreme verdict. In addition it takes out big threats like Obzedat, Ghost Council, Blood Baron of Vizkopa, or a god.
Rakdos's Return helps with decks that rely on having card advantage, mainly decks that use sphinx's revelation. It also helps disrupt the tempo of the other player.
Golgari Charm is a really nice utility part of this deck. It takes out small guys with its -1/-1 ability, takes out enchantments, and even regenerates creatures so blocking to trade doesn't always mean my creatures die.