LF 3x Obliterators, Chains of Mephistopheles, Polluted Delta

I am building Reid Duke's BG Rock deck. I mainly need 3x Phyrexian Obliterator, Twilight Mire, Sword of Light and Shadow, a couple Overgrown Tombs, and Thrun.

I am also building certain Legacy decks and am in need of 1 Wasteland, any dual land, and quite a few Legacy fetches (namely Polluted Delta).

The card I am mainly looking for is Chains of Mephistopheles
I am willing to give around $250 in value for a Chains. I have multiple high priced cards  that I would be willing to trade.
Please contact me if you have one to trade.

Notable Cards available:

JTMS (Worldwake)

Tropical Island

2 Marsh Flats, Bloodstained Mire, Polluted Delta (can only trade 2 out of 4)

Stoneforge Mystic

Tolarian Academy

Promo Batterskull

2x Toxic Deluge