Why Endrek Sahr?
Because I've always loved black, and sacrifice in particular. Endrek is an awesome commander for sacrifice shenanigans!
Strategy
Use thrull tokens for value. There's a bunch of sac outlets and associated cards that allow for mana acceleration, card draw, creature control, tutoring, discard and winning. The secondary theme is life usage - gain and pain for advantage (looking at Necropotence).
Win Cons
There's three infinite combos going on in here:
1.) Endless Cockroaches
+
Endrek Sahr, Master Breeder
+
Phyrexian Altar
. This is a mana positive combo so you get infinite coloured mana. Wins with Exsanguinate, Falkenrath Noble, Blood Artist, Zulaport Cutthroat, Bitter Ordeal,
Geth, Lord of the Vault
or through extort with Pontiff of Blight and Crypt Ghast. You can also kill single players with Ob Nixilis, Unshackled, Damnable Pact, Steel Hellkite and Nirkana Revenant. Using the left over token you can use this combo to make an infinitely large horde of tokens through Conspiracy, can empty everyone's hands with Sadistic Hypnotist, and can clear the board of creatures with Phyrexian Plaguelord. You can also sac the extra token to Viscera Seer to search your deck for anything you want.
The infinite creature ETBs allow you to clear the board with
Orc Sureshot
. The infinite die triggers allow you to draw your entire deck with Smothering Abomination.
2.) Ancestral Statue
+
Endrek Sahr, Master Breeder
+
Phyrexian Altar
. This works by targeting the Ancestral Statue with its own triggered ability. The combo is mana/token neutral, so you it works with all of the aforementioned pieces that trigger from die or etb events. This still makes it easily able to win the game.
3.) Ancestral Statue
+
Ashnod's Altar
+
Endrek Sahr, Master Breeder
. This is a mana positive combo but it only produces colourless mana, so it works with all of the aforementioned combos except for Nirkana Revenant and extort.
Gray Merchant of Asphodel. Gary is a beast. This guy does bucket loads of damage and gains insane amounts of life. Mikaeus, the Unhallowed, Volrath's Stronghold, Phyrexian Reclamation,
Ancestral Statue
, and Cauldron of Souls give you extra bites of the Gary cherry.
Pontiff of Blight comes into play with six tokens, meaning that with the requisite mana he can do a lot of damage.
Flesh-Eater Imp can kill in a single attack. Swiftfoot Boots and Lightning Greaves allow for surprise attacks and make him rather difficult to kill.
Mana Acceleration
Burnished Hart, Crypt Ghast, Magus of the Coffers, Solemn Simulacrum, Black Market, Nirkana Revenant, Phyrexian Altar, Sol Ring, Cabal Coffers, Phyrexian Tower and Nykthos, Shrine to Nyx should have it covered. Expedition Map makes sure you get your big lands.
Card Draw
Bloodgift Demon, Erebos, God of the Dead, Solemn Simulacrum, Dark Prophecy,
Greed
, Necropotence, Phyrexian Arena, Skullclamp, Smothering Abomination,
Reprocess
and Damnable Pact. Many other cards provide card advantage also.
Control
Orc Sureshot
, Phyrexian Plaguelord, Sadistic Hypnotist, Stronghold Assassin,
Tar Fiend
, Attrition, Dictate of Erebos,
Gate to Phyrexia
, Grave Pact, Mind Slash, Bitter Ordeal,
Kuon, Ogre Ascendant
,
Scour from Existence
and Helm of Possession.
Finally
Thanks for reading! Suggestions always welcome :)