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 LTB

Infinite ETB

Infinite sacrifice triggers

Infinite death triggers

Infinite storm count

Infinite +1/+1 counters on a creature

Evolution Witness

Myr Scrapling

Foundry Inspector

Activate Myr Scrapling by sacrificing it, targeting Evolution Witness.
When Myr Scrapling dies, Pitiless Plunderer triggers, creating a Treasure token.
Resolve the Myr Scrapling ability, putting a +1/+1 counter on Evolution Witness.
Evolution Witness triggers, returning Myr Scrapling from your graveyard to your hand.
Activate the Treasure by tapping and sacrificing it, adding {1}.
Cast Myr Scrapling by paying {1}.
Repeat.

Pitiless Plunderer

Activate Myr Scrapling by sacrificing itself, targeting Crystalline Crawler.
Myr Scrapling dies, triggering Enduring Renewal, returning Myr Scrapling from your graveyard to your hand.
Resolve the Myr Scrapling ability, putting a +1/+1 counter on Crystalline Crawler.
Activate Crystalline Crawler's first ability by removing a +1/+1 counter from it, adding {1}.
Cast Myr Scrapling by paying {1}.
Repeat.

Enduring Renewal

Crystalline Crawler

Activate Myr Scrapling by sacrificing it.
When Myr Scrapling dies, Yedora triggers, returning Myr Scrapling from your graveyard to the battlefield face-down as a Forest land.
When Myr Scrapling enters the battlefield, Zimone triggers.
Holding priority, activate Myr Scrapling by tapping it, adding {G}.
Resolve the Zimone trigger, turning Myr Scrapling face-up.
Resolve the Myr Scrapling ability from step 1.
Repeat.

Infinite green mana

Infinite landfall triggers

Infinite +1/+1 counters

Zimone, Mystery Unraveler

Yedora, Grave Gardener

Activate Myr Scrapling by sacrificing it.
When Myr Scrapling dies, Luminous Broodmoth triggers, returning Myr Scrapling from your graveyard to the battlefield without a flying counter on it due to Solemnity.
Resolve the Myr Scrapling ability.
Repeat.

Solemnity

Luminous Broodmoth

Activate Myr Scrapling by sacrificing it.
When Myr Scrapling dies, Mortuary and Bastion of Remembrance trigger.
Resolve the Mortuary trigger, putting Myr Scrapling from your graveyard onto the top of your library.
Resolve the Bastion of Remembrance trigger, causing you to gain 1 life and each opponent to lose 1 life.
Resolve the Myr Scrapling ability.
Cast Myr Scrapling from the top of your library by paying 1 life.
Repeat.

Infinite lifegain triggers

Infinite lifeloss

Mortuary

Bastion of Remembrance

Gwenom, Remorseless

Activate Myr Scrapling by sacrificing itself, targeting Workhorse.
Myr Scrapling dies, triggering Enduring Renewal, returning Myr Scrapling from your graveyard to your hand.
Resolve the Myr Scrapling ability, putting a +1/+1 counter on Workhorse.
Activate Workhorse by removing a +1/+1 counter from it, adding {C}.
Cast Myr Scrapling by paying {1}.
Repeat.

Workhorse

Activate Myr Scrapling by sacrificing itself, putting a +1/+1 counter on Arcbound Reclaimer.
Activate Arcbound Reclaimer by removing a +1/+1 counter from it, putting Myr Scrapling from your graveyard on top of your library.
Activate all mana-producing creatures you control by tapping them, adding at least {3}{R}.
Activate Hidetsugu's second ability by paying {2}{R} and tapping it, exiling Myr Scrapling from the top of your library with the ability to cast it from exile this turn, and dealing 1 damage to any target.
Cast Myr Scrapling from exile by paying {1}.
Myr Scrapling enters the battlefield, triggering Intruder Alarm, untapping all creatures.
Repeat.

Infinite damage

Hidetsugu, Devouring Chaos

Intruder Alarm

Arcbound Reclaimer

Cast Myr Scrapling by paying its mana cost if it is in your hand. Otherwise, activate Tayam by paying {3} and removing three counters from creatures you control, causing you to mill three cards and return Myr Scrapling from your graveyard to the battlefield with a vigilance counter on it.
When Myr Scrapling enters the battlefield, Metastatic Evangel triggers, causing you to put a +1/+1 counter on Cryptic Trilobite and Basking Broodscale and a vigilance counter on Myr Scrapling.
Basking Broodscale triggers, creating a 0/1 Eldrazi Spawn creature token that enters with a vigilance counter on it.
Activate Cryptic Trilobite by removing a +1/+1 counter from it, adding {C}{C} that can only be spent to activate abilities.
Activate the Eldrazi Spawn by sacrificing it, adding {C}.
Activate Tayam by paying {3}, removing both vigilance counters from Myr Scrapling and another counter from a creature you control.
Holding priority, activate Myr Scrapling by sacrificing it.
Resolve the Tayam ability, causing you to mill three cards and return Myr Scrapling from your graveyard to the battlefield with a vigilance counter on it.
Repeat from step 2.
Repeat.

Combos with "Myr Scrapling"