Activate Phyrexian Altar by sacrificing Oathsworn Vampire, adding {B}.
Cast Oathsworn Vampire from your graveyard by paying {B}.
Repeat.

Infinite LTB

Infinite ETB

Infinite sacrifice triggers

Infinite death triggers

Infinite storm count

Oathsworn Vampire

Phyrexian Altar

Honest Rutstein

Activate Myr Scrapling by sacrificing it, targeting Evolution Witness, putting a +1/+1 counter on Evolution Witness.
Evolution Witness triggers, returning Myr Scrapling from your graveyard to your hand.
Cast Myr Scrapling by paying {0}.
Repeat.

Infinite +1/+1 counters on a creature

Evolution Witness

Myr Scrapling

Cast Myr Retriever by paying {0}.
When Myr Retriever enters the battlefield, The Sibsig Ceremony triggers, destroying Myr Retriever and creating a 2/2 Zombie Druid creature token.
When Myr Retriever dies, it triggers, returning Scrap Trawler from your graveyard to your hand.
Cast Scrap Trawler by paying {0}.
When Scrap Trawler enters the battlefield, The Sibsig Ceremony triggers, destroying Scrap Trawler and creating a 2/2 Zombie Druid creature token.
When Scrap Trawler dies, it triggers, returning Myr Retriever from your graveyard to your hand.
Repeat.

Infinite creature tokens

The Sibsig Ceremony

Myr Retriever

Scrap Trawler

Cast Walking Ballista by paying {1}, causing it to enter the battlefield with a +1/+1 counter on it.
Activate Together Forever by paying {1}, targeting Walking Ballista.
Activate Ashnod's Altar by sacrificing Walking Ballista, adding {C}{C}.
When Walking Ballista dies, Together Forever triggers, returning Walking Ballista from your graveyard to your hand.
Repeat.

Together Forever

Ashnod's Altar

Walking Ballista

Activate Gwenna by tapping it, adding {U}{U} that can only be spent to cast creature spells or activate abilities of creatures.
Cast Aethersnipe for its evoke cost by paying {U}{U}.
Gwenna triggers, putting a +1/+1 counter on it and untapping it.
When Aethersnipe enters the battlefield, its first ability and evoke ability trigger.
Resolve the first Aethersnipe trigger, returning it from the battlefield to your hand.
Resolve the second Aethersnipe trigger, failing to sacrifice it as it is no longer on the battlefield.
Repeat.

Aethersnipe

Gwenna, Eyes of Gaea

Cast Whitemane Lion by paying {W}.
Spider-Man India triggers, putting a +1/+1 counter on Crystalline Crawler.
When Whitemane Lion enters, it triggers, returning itself from the battlefield to your hand.
Activate Crystalline Crawler by removing a +1/+1 counter from it, adding {W}.
Repeat.

Spider-Man India

Crystalline Crawler

Whitemane Lion

Cast Squee from your graveyard or from exile by paying {R}{R}.
Iraxxa triggers, creating a 2/2 Alien Warrior creature token.
Activate Thermopod's second ability twice by sacrificing Squee and the Alien Warrior, adding {R}{R}.
Repeat.

Iraxxa, Empress of Mars

Squee, the Immortal

Thermopod

Cast Squee from your graveyard or from exile by paying {R}{R}.
Iraxxa triggers, creating a 2/2 Alien Warrior creature token.
Activate Phyrexian Altar twice by sacrificing Squee and the Alien Warrior, adding {R}{R}.
Repeat.

Activate Viscera Seer by sacrificing Priest of Gix.
When Priest of Gix dies, Rakdos triggers.
Holding priority, activate Haunted Crossroads by paying {B}, putting Priest of Gix from your graveyard onto the top of your library.
Resolve the Rakdos trigger, causing you to exile the top three cards of your library with the ability to play them until your next end step.
Resolve the Viscera Seer ability from step 1.
Cast Priest of Gix from exile by paying {2}.
When Priest of Gix enters the battlefield, it triggers, adding {B}{B}{B}.
Repeat.

Infinite scry 1

Exile your library with the ability to play the exiled cards until your next turn

Rakdos, the Muscle

Priest of Gix

Haunted Crossroads

Viscera Seer

Activate Krark-Clan Ironworks by sacrificing Cathodion, adding {C}{C}.
When Cathodion dies, it triggers, adding {C}{C}{C}.
Activate Eldrazi Displacer by paying {2}{C}, blinking Edgar.
Cast Cathodion from your graveyard by paying {2}.
Repeat.

Edgar, Master Machinist

Eldrazi Displacer

Cathodion

Krark-Clan Ironworks

Cast Metallic Sliver by paying {0}.
When Metallic Sliver enters, it triggers, dealing 1 damage to target player or planeswalker and causing you to gain 2 life due to its ability and lifelink.
Activate Metallic Sliver by paying 2 life, returning it from the battlefield to your hand.
Repeat.

Combos with "Honest Rutstein"