Without the Anvil combo, Chains is textless vs too many decks. What if it used 
Dark Deal to make both players immediately Hellbent (then just played out of the GY via Loam replacement effect), or 
Waste Not to gain value from each iteration? Probably too cute.
Edit: Chains Stompy aka "I have too many Legends cards".dec
//Lands: 24
4 
Urza's Saga4 
Ancient Tomb1 
Urborg, Tomb of Yawgmoth4 
Verdant Catacombs3 
Bayou3 
Swamp1 
Forest1 
Nurturing Peatland3 
Wasteland//Artifacts: 14
4 
Mox Diamond4 
Chalice of the Void1 
Retrofitter Foundry1 
Pithing Needle2 
Anvil of Bogardan2 
Trinisphere//Mortgage Payments: 6
4 
Chains of Mephistopheles1 
Nether Void1 
The Abyss//Spells: 11
4 
Life from the Loam3 
Smallpox2 
Dark Deal2 
Baleful Mastery//Planeswalkers:  6
3 
Liliana of the Veil3 
Karn, the Great Creator//Sideboard: 15
1 
Mycosynth Lattice1 
Liquimetal Coating1 
Ensnaring Bridge1 
Anvil of Bogardan1 
Tormod's Crypt1 
Crucible of Worlds2 
Sudden Edict2 
Plague Engineer3 
Assassin's Trophy1 
Ghost Quarter1 
The Tabernacle at Pendrell Vale
Since most of the business happens at 2 mana anyway, the idea is to slow down the game to let the lock come online. Opponent is highly punished for running Brainstorm. Karn lets you hide copies of the more conditional cards (Anvil, 3sphere) in the SB and is another wincon. Ancient Tomb is good with Saga, accelerates Karn and the artifacts, and boost the land count to support Mox Diamond, probably better than running Ritual here (except that Liliana is harder to cast). Dark Deal combos with Chains to make both players Hellbent and then mill more cards, which should cripple the opponent but play well with Loam. 
This probably doesn't work in practice, but it sure seems like a fun reason to play Legends cards.
In paper, this is a good way to check if opponent knows the rules.
Trinisphere + Nether Void -> How much does that FoW cost again?
The Abyss + Saga/Foundry -> I have creatures, you don't 
Chains + Anvil + Loam -> Look I can do things, you can't