Let's begin directly with the deck build.

Monsters: 19
3 Earthbound Immortal Aslla Piscu
1 Dark Armed Dragon
1 Caius the Shadow Monarch
1 Dark Grepher
1 Gravekeeper's Descendant
2 Armageddon Knight
3 Mystic Tomato
3 Gravekeeper's Spy
1 Blackwing - Gale the Whirlwind
1 Sangan
1 Necro Gardna
1 Plaguespreader Zombie

Spells: 12
3 Black Garden
1 Allure of Darkness
1 Pot of Avarice
1 Reinforcement of the Army
2 Terraforming
1 Book of Moon
2 My Body as a Shield
1 Mystical Space Typhoon

Traps: 9
1 Call Of The Haunted
2 Revival of the Immortals
1 Solemn Judgment
2 Nightmare Archfiends
2 Remove Brainwashing
1 Mirror Force

Side Deck: 15
2 Blackwing - Sirocco the Dawn
3 Blackwing - Vayu the Emblem of Honor
2 Magical Merchant
2 D.D. Crow
3 Icarus Attack
2 Dust Tornado
1 Ceasefire

The advantage of a Black Garden build is that we can mass summon for the opponent, so we can add to Aslla's burn effect. At this point it's best to go for the burn right away in my opinion.
The rules of the E.I. are: No field? No party.
Normally i would go for 3 field and 3 Terraforming, but the number of death conditioned draws is already hight enough to risk any more. Not that i can complain. Summon Aslla when your opponen has at least 1 face up monster (opponent get's token) and direct attack for 1250. Tribute Aslla for Nightmare Archfiends to summon him 3 2000ATK tokens and one 800 ATK for yourself. Aslla's effect kicks in and clears them all out for 4000. Now Nightmare Archifiends effect deals an extra 2400. Empty field and you still have 1 token with 800 ATK plus we are still in battle phase]. Too many conditions, but all can combo well in many ways, so you always get an extra way out. You can get thank to Remove Brainwashing the tokens you gave to your opponent with Mystic Tomato, Gravekeeper's Spy and staff so you can tribute (or even better sometimes, set) Aslla, and even with Black Garden active you get some nasty kickpower.
Also with Black Garden out of commision, you can always use Remove Brainwashing in advantage to summon at your opponent the 3 Nightmare Arfiends tokens and get the back right away. They are 3x 2000 ATK after all that come all at once. They can kick very hard.
And let's not forget that people DO play Brain Control and similar.
My side is mostly against the opponent's sidedecking, rather than vs LL, Infernity and such. Not very smart, eh? Can't realy argue with that. Fact is however that Oppression will kick out this deck with no resserve, and not few people side in Nobleman, Skill and such. I can deal with most of them nicely if not otked. Sorry for misspelling some of the words xD... but I'm in a hurry.