This deck is based on a gimmick deck I made, in attempt to make it actually viable.
The main idea is to hit fast and hit hard! You're playing Rakdos forget about blocking! unleash your creatures and put your opponent on the defensive.
Spike Jester is a great early game card. If your opponents playing slow, then getting that three damage in early can really put the pressure on. I've played this against some heroic decks and he's useful at making your opponent chump block with what was going to be their beast heroic to remove it early, if you don't have any other forms of removal yet. And if they don't block it, Hey! You've just done three damage!
Hellhole Flailer is a great card. unleash him, and just throw him at everything! If he's going to get blocked and killed, just tap 4 mana and BOOM 4 damage direct to the opponent, plus you can boost him up with Spiteful Returned for some extra sac damage. You can use him as a finisher as well. Sac him at anytime to kill off your opponent when they're at low health.
Spiteful Returned is a new addition. I like having creatures do damage to opponents without even getting past their defenses (that's the reason for Carnage Gladiator). The best part is, if you draw it at a later stage in the game, you can bestow it, making your bombs like Rakdos, Lord of Riots even more of a threat!
Rakdos, Lord of Riots can cause undue to stress to your opponent, which is what every Rakdos player should want! Unfortunately you need to deal damage to the opponent to get him out. So if your opponent has blocked himself off and you can't sneak some damage through, you ain't gonna play him. This is where Shock comes in. It's a good early game removal but it's main purpose is for you to cast Rakdos, Lord of Riots. Granted it takes an extra mana to get him played but once he's out, you've got yourself a clear advantage. Also Spiteful Returned and Carnage Gladiator can help bring him out.
Onto removal. I originally had Doomblade in the deck but i feel Dreadbore fills the spot just as well and goes with the theme. Even though it's two colour and that might put people off, my rule when playing two colour decks is you need to have at least one of each mana in your starting hand. I've played too many games where all I got was of one type of mana the entire game and couldn't play anything. So with that in mind, you will be able to play this turn two. I've also come up against some hexproof and Gods Willing so devour flesh is the answer to that.
Exava, Rakdos Blood Witch has been a life saver and has turned games around from guaranteed loss to a win because I drew her on the last turn. Giving all creatures with +1/+1 counters haste! All them late game Rakdos cacklers just became useful!
Other than that, the rest of the creatures are pretty solid drops for their mana cost. Rix Maadi Guildmage is nice in that it's a 2/2 for two and if you have the mana it's got some useful abilities. She can keep some creatures alive if they are blocked or just dealing that one extra damage to rub it in your opponents face.
It's purely a casual deck (it's $25!) meant for a bit of fun. Don't get attached to your creatures cause you're bound to lose them but there's plenty more! Hit your opponent fast, hard and have fun!
