I’m still basically holding out for a great blue-black commander, but meanwhile, let’s look at what we can do with this guy.

If you can’t tell what it says on the card, here’s the text:

The Scorpion God
3BR
Legendary Creature – God
Whenever a creature with -1/-1 counter on it dies, draw a card.

1BR: Put a -1/-1 counter on another target creature.

When the Scorpion God dies, return it to its owner’s hand at the beginning of the next end step.
6/5

So, plenty of counters around. Some of this stuff is quite easy.

[draft]Archfiend of Ifnir
Black Sun’s Zenith
Blowfly Infestation
Carnifex Demon
Contagion Clasp
Contagion Engine
Corrosive Mentor
Crumbling Ashes
Dusk Urchins
Grim Affliction
Harbinger of Night
Liliana’s Influence
Merciless Javelineer
Midnight Banshee
Necroskitter
Nest of Scarabs
Puppeteer Clique
Soul Snuffers[/draft]

Not much red here, but what can you do?

I don’t know how much I want to push the theme beyond this. These require some work anyhow. We can help the Archfiend without sacrificing too much.

[draft]Ash Barrens
Barren Moor
Canyon Slough
Forgotten Cave
Scarab Feast
Tormenting Voice
Cathartic Reunion
Magmatic Insight
Geier Reach Sanitarium
Liliana of the Veil
Sire of Insanity
Insidious Dreams[/draft]

… and if we’re discarding a lot, then we might want cards with madness or recurring creatures.

[draft]Big Game Hunter
Asylum Visitor
From Under the Floorboards
Murderous Compulsion
Stromkirk Occultist
Voldaren Pariah
Nether Traitor
Bloodghast
Reassembling Skeleton
Scrapheap Scrounger[/draft]

Otherwise, we can fill the curve with various cards that give us time to set up full control of the board with our god. Not that I’ll even try to optimize this… Also, my better understanding of black than red might show here… You know, just a bit.

[draft]Syphon Flesh
Damnation
Go for the Throat
Doom Blade
Terminate
Dreadbore
Decree of Pain[/draft]

.. and bunch of other stuff.

[deck]
[commander]
The Scorpion God
[/commander]
[creatures]
Archfiend of Ifnir
Carnifex Demon
Sire of Insanity
Corrosive Mentor
Dusk Urchin
Harbinger of Night
Merciless Javelineer
Midnight Banshee
Necroskitter
Puppeteer Clique
Soul Snuffers
Big Game Hunter
Asylum Visitor
Bloodghast
Nether Traitor
Reassembling Skeleton
Voldaren Pariah
Scrapheap Scrounger
Stromkirk Occultist
Pilgrim’s Eye
Solemn Simulacrum
Burnished Hart
[/creatures]
[spells]
Black Sun’s Zenith
Blowfly Infestation
Contagion Clasp
Contagion Engine
Grim Affliction
Crumbling Ashes
Liliana’s Influence
Nest of Scarabs
Scarab Feast
Tormenting Voice
Cathartic Reunion
Magmatic Insight
Liliana of the Veil
Insidious Dreams
From Under the Floorboards
Murderous Compulsion
Syphon Flesh
Damnation
Go for the Throat
Doom Blade
Terminate
Dreadbore
Spread the Sickness
Decree of Pain
Read the Bones
Phyrexian Arena
Staff of Nin
Rakdos Signet
Armillary Sphere
Wayfarer’s Bauble
Everflowing Chalice
Journeyer’s Kite
Vessel of Endless Rest
Coldsteel Heart
Thran Dynamo
Thought Vessel
Worn Powerstone
[/spells]
[lands]
Drownyard Temple
Ash Barrens
Barren Moor
Forgotten Cave
Canyon Slough
Geier Reach Sanitarium
Volrath’s Stronghold
Blood Crypt
Dragonskull Summit
Foreboding Ruins
Smoldering Marsh
Tainted Peak
Bloodstained Mire
Thawing Glaciers
Myriad Landscape
Graven Cairns
Temple of Malice
Rakdos Carnarium
Blackcleave Cliffs
Sulfurous Springs
Shadowblood Ridge
10 Swamp
9 Mountain
[/lands]
[/deck]