UPDATE: THIS DECK NEEDS SOME TWEAKING TO REGAIN IT'S FORMER POWER/EFFICIENCY POST MULLIGAN RULE CHANGE. I WILL CIRCLE BACK ON IT SOMEDAY - OR UPGRADE FOR COMP METAS.
Here we have an exploration of a different way to play Athreos. Most people running the God of Facial Hair are trying to get value off large creatures like Archon of Justice, Grey Merchant and Ashen Rider or are running Shadowborn Apostles. The choice to allow recursion of large creatures in this type of punisher deck becomes quite obvious - the answer will be "no".
Instead, this deck recognizes that as the game goes on, Athreos acts more and more like Enduring Renewal. What are the most powerful ways to use enduring renewal? Free creatures and 1 drops which can get multiple death/life triggers per turn if returned to hand.
The ultimate goal of this deck is to pull off an "infinite extort". The chances of doing this are quite low but if you get it you will feel like a boss and it is important to have a lofty if seldom achieved goal to strive for in EDH. To achieve the infinite extort you need the following:
[Any Extort Card + Carnival of Souls + Enduring Renewal/Athreos + Shifting Wall/Phyrexian Marauder/Endless One OR another "free" + a free sac outlet].
You also have infinite life combos in:
[(Suture priest/Soul Warden/Soul's Attendant) + Athreos/Enduring Renewal + (Zero-Drop creature and sac outlet or Phyrexian Marauder / Shifting wall) ]
Swap Suture Priest/Soul Sisters out of the above for Blood Artist/Disciple of the Vault/Zulaport Cutthroat and you can infinite drain.
Swap Suture Priest/Soul Sisters out of the above for Genesis Chamber and you get infinite creatures.
Swap Suture Pries/Soul Sisters out for Bloodthrone Vampire/Carrior Feeder and you have an infinite power creature.
You can also get infinite etb/ltb triggers with only [Leonin Relic-Warder + Animate Dead] to use with the above triggered "whenever"s.
Here is the gameplan for playing Athreos:
Evaluate your opening hand and plan your course. Your top priority is to find mana of both colors. 3 land is good, 2 is ok if you have ramp or a tutor 1 is ok if you have Tithe or Weathered Wayfarer. Step 2 is to dump your hand and draw more cards. See what engines and interactions occur organically and bolster them with a tutored piece if needed. Sometimes you will be dropping an extort creature and then a bunch of cheap creatures and spells. Sometimes you will get a Mentor of the Meek online with Genesis Chamber. Sometimes you get Sword of the Animist onto an Ornithopter and ramp through the roof. Sometimes you will be recurring a Vulturous Aven or Solemn Simulacrum through Phyrexian Reclamation or Tortured Existence.
After seeing the first 10 or so cards, decide whether you want to go for the combo or just win through attrition and value. If you go for attrition, the goal will be to reduce the life total of a single opponent to a low enough value that they will not want to eat the 3 life necessary to send your creature to the yard. This is done using a combination of Athreos triggers (primary), beatdown (supplementary), and extortion/drain (supplementary). At 3 life per dude plus a few extortions, attacks, and death-trigger drains, you will need about 7 or 8 creatures to die before their choice becomes real tough.
This is where Wound Reflection becomes the important win con. If you can extort once or twice and force one Athreos trigger per turn, it's a loss of 4 life that doubles to 8. This puts an opponent on a 3ish turn clock before they cant afford to pay the Athreos trigger and you get your creatures back to combo out at will using a 0 drop creature plus Blood Artist, Zulaport Cutthroat, or Disciple of the Vault.
For the combo game, the easiest way is to land Enduring Renewal along with a death trigger dude like Blood Artist and an X CMC dude like Shifting Wall. Then you just cast for X=0, let it die, get the trigger, and get it back in hand. If tutoring for Enduring Renewal it's best to just find Academy Rector. If it gets countered you can recur it - or you can force it through with Cavern of Souls; then sac to get Enduring Renewal when needed.
Three piece combos can be unreliable - however we really only need two pieces with all the tutors because if we have Ranger of Eos then we can get an X CMC guy like Shifting Wall and Disciple of the Vault which will give the death Trigger for Wall. This means that if we have Enduring Renewal and Ranger we win (unless disrupted); or if we have Ranger and a tutor; or if we have Enduring Renewal and a tutor. This is why this deck is resilient and goldfishes pretty consistently around T5-T6 (yes I know this isn't as good as Tier 1 decks but the flexibility to go into attrition mode makes this version reasonably strong and so much fun).
Other tricks and synergies:
-Use Sensei's Top to ensure only 1 life lost from Dark Tuteledge or Dark Confidant
-Use Sensei's Top to extort easily every turn.
-Use Genesis Chamber with Mentor of the Meek and /or Skullclamp and Carnival of Souls.
-Equip Sword of the Animist to an attacking Ornithopter or Phyrexian Walker on t3 without needing prior ramp.
-Carnival of Souls seems weak but it is really pretty strong in this build. I had one game recently against mono-blue control Thassa where on T4 I had Phyrexian Reclamation, Bloodthrone Vampire, Athreos, Carnival of Souls, and Ornithopter. Cast Ornithopter, get a black mana from Carnival of Souls, sac to Bloodthrone and give the opponent the Athreos trigger. He pays 3 life wisely to send Ornithopter to the yard, but I use the black along with more mana to recur the thopter and to it again. So with my 4 lands he had to eat 4 Athreos triggers and then get attacked from a 9/9 Bloodthrone Vampire with no clear way to stop the loop again next turn. He scooped on T4.
As listed, this deck is about 95% optimized (or, rather, it is 100% optimized at 95% power relative to max available) which is where I want to be; straddling the line between strong and cutthroat. To bring it to maximum power we'd add Mana Crypt, Necropotence, Ad-Naus, and some Hate Bears and take out all the extort dudes. We'd also replace all the comes-into-play-tapped lands and add all the neighboring-colored fetch lands. I've played it that way and it's stronger but more linear and less fun.
More tech and synergies when I have time. Enjoy!
Out: Ambition's Cost, In: Vulturous Raven
Out: Blood Pet, In: Disciple of the Vault
Out: Children of Korlis, In: Gift of Immortality
Out: Disenchant, In: Utter End
Out: Evolving Wilds, In: Godless Shrine
Out: Fellwar Stone, In: Oath of Lieges
Out: Falkenrath Noble, In: Infernal Tribute
Out: Orzhov Bascilica, In: Feted Heath
Out: Orzhov Signet, In: Land Tax
Out: Pilgrim's Eye, In: Tithe
Out: Ronom Unicorn, In: Solemn Simulacrum
Out: Smokestack, In: Qarsi High Priest
Out: Wispmare, In: Phyrexian Altar
Out: Terramorphic Expanse, In: Marsh Flats
Out: Phyrexian Revoker, In: Expedition Map
Out: Expedition Map, In: Phyrexian Rager
Out: Cloudstone Curio, In: Wall of Omens
Out: Capashen Unicorn, In: Children of Korlis
Out: Diabolic Intent, In: Dark Tutelage
Out: Spawning Pit, In: Lifeline
Out: Infernal tribute, In: Kor Cartographer
Out: Oath of Lieges, In: Martyr's Cause
Out: Children of Korlis: In: Phyrexian Revoker
OUt: Martyr's Cause In: Vampiric Tutor
Out: Oath of Lieges, In: Attrition
Out: Kor Cartographer, In: Tithe
Out: Utter End, In: Disenchant
Out: Lifeline, In: Spawning Pit
Out: Read the Bones, In: Ophiomancer
Out: Gift of Immortality, In: Martyred Rusalka
Out: Night's Whisper, In: Strionic Resonator
Out: Opiomancer, In: Cartel Aristocrat
Out: Phyrexian Marauder, In: Children of Korlis
Out: Phyrexian Revoker, In: Phyrexian Arena
Out: Soldevi Adnate, In: Kor Sanctifiers
Out: Wall of Omens, In: Diabolic Intent
Out: kor sNctifiers, in: utter end
Out: strionic resonator, in: phyrexian reclamation
Out: Wayfarer's Bauble, In: Swamp
Out: Spawning Pit, In: Thoughtpicker Witch
out: phyrexian altar in: gift of immortality
Out: kami of false hope, in: plagued rusalka
Out: disciple of the vault, in: dark confidant
Out: trading post, in: phyrexian altar
Out: living death, in: slum reaver
Out: qarsi high priest, in: trading post
Out: mindslicer, in: Falkenrath noble
Out: Plagues Rusalka, in: Qarsi High Priest
Out: Phyrexian Altar, In: Kami of False Hope
Out: Trading Post, In: Dimir House Guard
Out: Thoughtpicker Witch, In: City of Brass
Out: Swamp, In: Night's Whisper
Out: Falkenrath Noble, In: Trading Post
Out: Martyred Rusalka, In: Swamp
Out: Night's Whisper, In: Planar Guide
Out: land tax, in: dark ritual
Out: Planar Guide, In: Plagued Rusalka
Out: Plagued Rusalka, In: Disciple of the Vault
Out: Trading Post, In: Phyrexian Altar
Out: Qarsi High Priest, In: Wayfarer's Bauble
Out: Edgewalker, In: Dimir Signet
Out: Dimir House Guard, In: Oath of lieges
Out: oath of lieges, in: tortured existence
Out: priest of gix, in: ambitions cost
Out: ambitions cost, in: read the bones
Out: read the bones, in: Disciple of bolas
Out: tortured existance: in: Graveborn Muse
Out: Syphon Mind: in: Wispmare
Out: Diabolic Intent, In: Sidisi, Undead Vizier
OUt: Wispmare, In: Dross Hopper
Out: Dark Ritual, In: Qarsi High Priest
Out: Slum Reaper, In: Bitterblossom
Out: Dross Hopper, In: Thoughtpicker Witch
Out: thoughtpicker witch, in: greed
Out: disciple of bolas, in: sensei's divining top
Out: phyrexian altar, in: mindslicer
Out: bitterblossom, in: trading post
Out: utter end. In: living death
Out: living death, In: utter end
Out: trading post, in: wound reflection
Out: Wound Reflection, in: Maze of Ith
Out: Cartel Aristocrat, in: Dross Hopper
Out: dross hopper, in cartel aristocrat
Out: utter end, in qarsi high priest
Out: phyrexian altar, in: living death
Out: disciple of the vault, in: zulaport cutthroat
Out: maze of ith, in: smothering abomination
Out: qarsi high priest, in: vampiric rites
Out: greed, in: sword of the animist
Out: Grave Pact In: False Prophet
Out: False Prophet, In: No Mercy
Out: No Mercy, In: False Prophet
Out: Kor Haveen, In: Volrath's Stronghold
Out: Fleshbag Marauder, In: Swords to Plowshares
Out: Shield Sphere, In: Ranger of Eos
Out: Kami of False Hope, In: Disciple of the Vault
Out: Dictate of Erebos, In: Grave Pact
Out: Vampiric Rites, In: Kami of False Hope
Out: Altar of the Brood, In: Vampiric Rites
Out: Grave Pact, In: Wrath of God
Out: Shifting Wall, In: Endless One
Out: Vampiric Rites, In: Path to Exile
Out: Volrath's Stronghold, In: Kor Haven
Out: gift of immortality, in: altar of the brood
Out: phyrexian walker, in: blood pet
Out: kami of false hope, in: shifting wall.
Out: children of korlis, in: phyrexian walker
Out: syndic of tithes, In: Kataki, War's Wage
Out: Reliquary Monk, In: Grand abolisher
Out: Tithe Drinker, In: Stony Silence
Out: Suture Priest, In: Dark Ritual
Out, Wayfarer's Bauble, In: Jeweled Amulaet
Out: Carnival of Souls, In: Necropotence
Out: Bascilica Screecher, In: Priest of Gix
Out: soul warden, in: bascilica screecher
Out: living death, in: dross hopper
Out: Sword of the Animist In: carnival of souls
Out: Attrition In; Grave PACT
[Some changes]: in - Ad Naus, Necrologia, out: grave pact, priest, amulet, stony silence.
Took out some of the "competetive" cards and hatebears. Went back to a fun engine / extort plan.