I would not run Erbos main-board. The combination of Erebos and the other twelve 3cc cards in a shell with only sixteen lands that come into play untapped will not work for aggro.
Get rid of Evolving Wilds. It can only find swamps so it is better to just run a swamp. Consider Agent of the Fates as he is a sensational target for bestow creatures.
Not sure about Mogis' Marauder main deck as Black decks are pretty popular
At the same time, you also have to figure, it gives itself haste, to me thats just as important, and if its late enough into the game you can give other cards haste this turn that you played. I love Mogis' Marauder. It has won me so many games, black is actually falling off in the local meta here.
No reason to run evolving wilds at all since you're mono colored. Hero's Downfall is too slow to be a 4-of in this deck, try upping ulcerate to 2-3 if you're having issues with creatures, or try Ultimate Price. You only run 20 lands, so your average CMC should be about 1.75, but yours is quite a bit higher. Pharika's chosen is great in limited but lackluster in Standard, try Rakdos Cackler in its place. Spiteful returned is decent but you'll generally get more mileage out of 4 Pain Seer and some Rakdos Shred-Freak.
4 Tormented Hero
4 Gnarled Scarhide
4 Spiteful Returned
2 Pain Seer
4 Herald of Torment
4 Mogis's Marauder
2 Erebos, God of the Dead
4 Hero's Downfall
2 Bile Blight
4 Thoughtseize
4 Evolving Wilds
UW Control
Rabble R
Modern
Mono U Tron
BW Midrange
2 Whip of Erebos
2 Feast of Dreams
1 Hall of Triumph
4 Phyrexian Revoker
2 Indulgent Tormentor
2 Accursed Spirit
At the same time, you also have to figure, it gives itself haste, to me thats just as important, and if its late enough into the game you can give other cards haste this turn that you played. I love Mogis' Marauder. It has won me so many games, black is actually falling off in the local meta here.
Hope this helped! Good luck.
Standard Budget Decks Link:
http://www.mtgsalvation.com/forums/the-game/standard-type-2/budget-standard/752237-clownstabbers-budget-decks