Crosis deck

[baprice93]

I need some help building a deck with Crosis, the Purger as my Commander. I have a few cards in it so far like Nicol Bolas, Planeswalker, Countersquall, Undermine, Unscythe, Killer of Kings, and Crumbling Necropolis. Suggestions would help.

[baprice93]

come on people i really need some help. i've been able to get a good amount of cards for the deck, but now i need help with my mana base. this is what i have so far for a mana base.

Mana Vault
Crumbling Necropolis
Thran Quarry
Command Tower
Caldera Lake
Drowned Catacomb

[Xavier]

Darkslick Shores
Reliquary Tower
Nephalia Drownyard
Lavaclaw Reaches
Spinerock Knoll
Lonely Sandbar
Phyrexian Tower
Sulfur Falls
Drowned Catacomb
Command Tower
Akoum Refuge
Bojuka Bog
Great Furnace
Jwar Isle Refuge
Urborg, Tomb of Yawgmoth
Creeping Tar Pit
Rocky Tar Pit
Graven Cairns
Forgotten Cave
Blackcleave Cliffs
Crumbling Necropolis
Seat of the Synod
Desolate Lighthouse
Cabal Coffers
Strip Mine
Scalding Tarn
Sulfurous Springs
Blood Crypt
Barren Moor
Dragonskull Summit
Vault of Whispers
Vesuva