I have mixed feelings about Altar of Chaos, it has a huge potential but not that good play wise.
I built this deck around it:
Build 4 Altar of Chaos in a circle pattern
Build Furnace of Flesh in the middle
Spawn 5~6 Cultist Master
Then use his ability and the altars with Nightcrawlers, repeat 4 times.
Spawn 1 Lost Warlord and activate Revenant Doom.
Go to the enemy base with 1 Lost Warlord, use Life Weaving so he won't die easily.
Cast Frenetic Assault on the enemies.
Put 1 Nether Bomb near enemy camp, cast Shield Building on it.