This deck is all combo. Here’s the breakdown (this is going to take a while):

All recent updates will be in bold.

Please keep in mind, x almost always equals 1 for Marath, therefore, Hardened Scales counts as a counter doubler, and in the case of Marath, Illusionist's Bracers counts as both a counter doubler and a token doubler.

Gyre Sage with 4 or more counters + Umbral Mantle = infinite green mana and an infinitely large Gyre Sage. With your infinite mana, you can move the Umbral Mantle to Kiki-Jiki, Mirror Breaker for infinite of any creatures he can target.

Kiki-Jiki, Mirror Breaker can also be used with Umbral Mantle and any creature that produces tokens if there are enough tokens to produce at least three mana with whatever mana source you have. It also works with any creature if you have a token doubler or Illusionist's Bracers and the necessary mana sources.

Kiki-Jiki, Mirror Breaker combos with Zealous Conscripts, Restoration Angel, or Village Bell-Ringer for infinite tokens with haste and should usually be your targets for an entwined Tooth and Nail or Defense of the Heart. However, sometimes you can’t attack a player, so you could try a combo involving Purphoros, God of the Forge instead. Splinter Twin works like Kiki-Jiki, Mirror Breaker but doesn’t work with Restoration Angel.

Soul Warden and Soul's Attendant can bounce each other with Cloudstone Curio to be recast with Earthcraft or Mana Echoes and an adequate mana filter, gaining you infinite life or Purphoros, God of the Forge triggers.

Archangel of Thune can replace counters on Marath, Will of the Wild with Soul's Attendant or Soul Warden for tokens, or Basilisk Collar on Marath for damage. The collar requires a separate infinite loop for the mana, but the Soul Sisters only require that you can get mana for your tokens.

Heliod, Sun-Crowned can replace counters on Marath when using the ability for damage, or through a Soul Warden or Soul's Attendant when generating creatures. With a Soul Sister, Heliod, and Marath, you can go infinite with Ashnod's Altar or Mana Echoes by alternating between tokens and damage, or with Earthcraft and Phyrexian Altar in the same way, or with either of those and a token doubler.

Cathars' Crusade and anything that can give you mana for your tokens can loop with Marath.

Mycosynth Lattice and Skyshroud Elf help to filter infinite colorless (or green in the case of Gyre Sage) mana into usable colors, allowing you to infinitely recast Marath, Will of the Wild using the damage ability to kill everyone else (Skyshroud Elf can only do this with the Gyre Sage combo unless a combo involves Earthcraft and you’re missing either Mountain or Plains).

Eldrazi Displacer can infinitely Exile the same etb token generating Eldrazi if you get 3 or more spawns/scions from it. This can be used with a payout card such as Purphoros, or a token doubler for infinite tokens/mana. Earthcraft (with Wastes), Ashnod's Altar, or Mana Echoes will allow you to use Avenger of Zendikar instead. If you have Illusionist's Bracers you can Exile two etb token Eldrazi at once, or you can use Zealous Conscripts and Restoration Angel (targeting the Conscripts) to steal two creatures at a time, sacrificing them to Ashnod's Altar to repeat until your opponent’s creatures are all gone.

Hellkite Charger or Aggravated Assault can be used with Bear Umbra, Nature's Will, Sword of Feast and Famine or (with enough creatures) Earthcraft for infinite combat steps, or infinite mana in the case of Aggravated Assault and Earthcraft.

Cloudstone Curio can combo with a token generating creature if the tokens give you enough mana. Earthcraft and token doublers can help, as well as mana filters.

Kiki-Jiki, Mirror Breaker can also combo with Nim Deathmantle, Ashnod's Altar, and any other creature by copying the creature, then sacrificing the copy and Kiki, then using the mana to pay for the trigger on the Deathmantle.

Mana Echoes, Nim Deathmantle, and either Ashnod's Altar or Phyrexian Altar can go infinite with any creature if you have enough creatures of the same type to cover the cost, but the most obvious choice would be Marath, Will of the Wild. An important thing to remember about Mana Echoes is that the ability uses the stack since it doesn’t conform to all of the rules that define a mana ability (a triggered mana ability can only be triggered by a mana ability). This means you can respond to Marath entering the battlefield by producing tokens, which will increase the amount of mana produced on the resolution of each trigger. If you get enough mana to pay for Deathmantle, you can sacrifice the creature and pay to immediately bring it back repeatedly. If the amount of mana produced in total is greater than four each iteration, you can net infinite mana, otherwise you can infinitely trigger another card like Purphoros, God of the Forge or Fecundity.

Dockside Extortionist can combo in place of another token generating creature and a mana source, thus reducing the number of necessary cards.

Conclave Mentor can take the place of Hardened Scales in any combos involving it, and can trigger Archangel of Thune when sacrificed, which can be part of infinite loops involving Nim Deathmantle if the counters can net mana, possibly by making tokens with the Commander.

There are many more complicated interactions involving larger numbers of cards. This deck lets you be creative in how you combo off, so you should always be looking to combine these cards in new ways. I know I will, so maybe I’ll add more combos, but I believe I’ve at least covered the basics (and then some).

Prosperous Innkeeper can take the place of either of the Soul Sisters, using the treasure to pay the extra mana in its cost and for color fixing. It can also be used with Kiki/Twin combos with Umbral Mantle, or Eldrazi Displacer with token doublers and/or other mana sources.

I’m currently in the process of upgrading cards to the most beautiful versions I can find. Keep an eye out for those upgrades. Update: I’M FINALLY FINISHED!!!!!!!

If anyone needs clarification on any combos in this, I would be willing to explain step by step how the combos work in the comments. However, I don’t check notifications on this site as often as other sites, so you might have to wait a while.

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Casual

97% Competitive

Date added 7 years
Last updated 2 years
Legality

This deck is not Commander / EDH legal.

Rarity (main - side)

25 - 0 Mythic Rares

38 - 0 Rares

13 - 0 Uncommons

6 - 0 Commons

Cards 100
Avg. CMC 3.27
Tokens Beast 3/1 R, Copy Clone, Eldrazi Scion 1/1 C, Eldrazi Spawn 0/1 C, Elemental X/X G, Plant 0/1 G, Spirit 1/1 C, Treasure
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