I have not seen a Skithiryx thread on here before. There seem to be two ways to build Skithiryx, one is a straight infect deck with pretty all black/artifact infect creatures, the other is more of a mono black control deck that uses infect as a win condition. I'm inclined to go more the control route. The deck is also capable of very fast wins with Lake of the Dead, Hatred, etc. This is useful against decks like Maelstrom Wanderer, and why I think Skithiryx will fare better against Wanderer than Griselbrand, the other mono black commander of choice.
I run more infect creatures in my build, I suggest Phyrexian Vatmother for the beats and Flesh Eater Imp for evasion.
Dystopia is another must in mono-black. Another way could destroy troublesome enchantments like Nevermore and Sylvan Library. Sometimes wins games by itself against white and/or green.
I think Ghastly Demise is subpar. I don't run Doom Blade and non-Black only kill because of my meta. I run Drown in Sorrow for cheap mass weenie removal, but again this is a metagame choice
Volrath's Stronghold is a card I'd like to add in my deck if I get a copy. I'll be adding graveyard hate because of the sudden boom in reanimator decks where I play.
I went 4-3 in a recent 65 player french ban MTG Manila tourney. Lost to the Skittles mirror (that guy made it to top 8), Oloro (Iona entered play 3x in 2 games) and Mimeoplasm (I suck against graveyard based decks.) Wins were against Zeganna, Thalia, Sigarda and Rafiq.
Dystopia is the number 1 tutor target against white or green based decks. I've lost to that card against mono black, so I can attest to the powerif the card against decks it is trying to hate.
Maybe you can try to put 1 or 2 reanimation effects if you can fit them in the deck to have some outs against reanimator commanders. The problem with reanimation spells is that they tend to be sorcery speed, so you can't steal creatures in the opponents GY during their turn.
for tutor:
have to put in the following cards below to make your deck more consistent beseech the queen cruel tutor grim tutor i wish i could get a copy of this
for planeswalker: karn liberated to deal with those pesky artifacts and enchanment liliana of the dark realms can get you the needed swamp, kill a creature or pump skittle.
1 Skithyrix, the Blight Dragon
Acceleration
1 Everflowing Chalice
1 Mind Stone
1 Worn Powerstone
1 Dark Ritual
Equipment
1 Lashwrithe
1 Lightning Greaves
1 Nightmare Lash
1 Swiftfoot Boots
1 Whispersilk Cloak
Infect Creatures
1 Ichor Rats
1 Ichorclaw Myr
1 Phyrexian Crusader
1 Plague Myr
1 Plague Stinger
1 Whisper Specter
Spot Removal
1 Blight
1 Devour Flesh
1 Diabolic Edict
1 Dismember
1 Doom Blade
1 Innocent Blood
1 Geth's Verdict
1 Ghastly Demise
1 Go for the Throat
1 Grasp of Darkness
1 Snuff Out
1 Sudden Death
1 Victim of Night
1 Oblivion Stone
1 Nevinyrral's Disk
1 Damnation
1 Decree of Pain
1 Toxic Deluge
1 Mutilate
1 All is Dust
1 Black Sun's Zenith
Discard
1 Duress
1 Thoughtseize
1 Inquisition of Kozilek
1 Distress
1 Coercion
1 Mind Shatter
1 Night Terrors
1 Hymn to Tourach
1 Night Terrors
Draw
1 Dark Confidant
1 Phyrexian Arena
1 Dark Tutelage
1 Sign in Blood
1 Night's Whisper
1 Read the Bones
1 Skeletal Scrying
1 Expedition Map
1 Demonic Tutor
Misc
1 Liliana of the Veil
1 Unspeakable Symbol
1 Caress of Phyrexia
1 Hatred
1 Vampire Hexmage
1 Pithing Needle
Lands
29 Swamp
1 Bojuka Bog
1 Cabal Coffers
1 Ghost Quarter
1 Inkmoth Nexus
1 Lake of the Dead
1 Maze of Ith
1 Tectonic Edge
1 Temple of the False God
1 Urborg, Tomb of Yawgmoth
1 Wasteland
BGW Junk / URB Grixis Shadow / RGB Lantern Control / WUBCBant Eldrazi
Current Legacy decks
BUG Shardless BUG / UWR Predict Miracles / RUG Canadian Thresh / WRBG 4c Loam
UB Reanimator
Not sure what you mean...there are 39 lands currently.
BGW Junk / URB Grixis Shadow / RGB Lantern Control / WUBCBant Eldrazi
Current Legacy decks
BUG Shardless BUG / UWR Predict Miracles / RUG Canadian Thresh / WRBG 4c Loam
UB Reanimator
I run more infect creatures in my build, I suggest Phyrexian Vatmother for the beats and Flesh Eater Imp for evasion.
Dystopia is another must in mono-black. Another way could destroy troublesome enchantments like Nevermore and Sylvan Library. Sometimes wins games by itself against white and/or green.
I think Ghastly Demise is subpar. I don't run Doom Blade and non-Black only kill because of my meta. I run Drown in Sorrow for cheap mass weenie removal, but again this is a metagame choice
Volrath's Stronghold is a card I'd like to add in my deck if I get a copy. I'll be adding graveyard hate because of the sudden boom in reanimator decks where I play.
I went 4-3 in a recent 65 player french ban MTG Manila tourney. Lost to the Skittles mirror (that guy made it to top 8), Oloro (Iona entered play 3x in 2 games) and Mimeoplasm (I suck against graveyard based decks.) Wins were against Zeganna, Thalia, Sigarda and Rafiq.
Maybe you can try to put 1 or 2 reanimation effects if you can fit them in the deck to have some outs against reanimator commanders. The problem with reanimation spells is that they tend to be sorcery speed, so you can't steal creatures in the opponents GY during their turn.
below are my suggestion for you.
for equipment:
no need for swiftfoot boots and whispersilk cloak...you only need the card below to finish the game:
lashwrithe
nightmare lash and
lightning greaves.
for land:
i agree with miked01, volrath is a must...then put in:
shizo, death's storehouse to give skittles fear
cavern of souls to that skittles can't be countered
boseiju, who shelters all to ensure your spells resolved againts blue mages
for tutor:
have to put in the following cards below to make your deck more consistent
beseech the queen
cruel tutor
grim tutor i wish i could get a copy of this
for planeswalker:
karn liberated to deal with those pesky artifacts and enchanment
liliana of the dark realms can get you the needed swamp, kill a creature or pump skittle.
misc cards:
yawgmoth's will cast those spells one more time!
jet medallion cc less 1, yes please.