Cast Murderous Redcap by paying {2}{B/R}{B/R}, which enters with a +1/+1 counter on it due to Uncivil Unrest.
When Murderous Redcap enters the battlefield, it triggers, dealing an amount of damage to itself equal to its power.
Murderous Redcap dies as a state-based action due to having 0 toughness.
Murderous Redcap's persist ability triggers, returning it from your graveyard to the battlefield without a -1/-1 counter on it due to Uncivil Unrest.
Repeat from step 2.

Infinite LTB

Infinite ETB

Infinite death triggers

Murderous Redcap

Uncivil Unrest

Activate Skirk Prospector by sacrificing Putrid Goblin, adding {R}.
When Putrid Goblin dies, its persist ability triggers, returning it from your graveyard to the battlefield without a -1/-1 counter on it due to Uncivil Unrest.
Repeat.

Infinite sacrifice triggers

Infinite red mana

Putrid Goblin

Skirk Prospector

Cast Cryptic Trilobite by paying {0}, causing it to enter the battlefield with a +1/+1 counter on it due to Uncivil Unrest.
Activate Together Forever by paying {1}, targeting Cryptic Trilobite.
Activate Cryptic Trilobite by removing a +1/+1 counter from it, adding {C}{C} that can only be spent to activate abilities.
Cryptic Trilobite dies as a state-based action due to having 0 toughness, triggering Together Forever, returning Cryptic Trilobite from your graveyard to your hand.
Repeat.

Infinite storm count

Infinite colorless mana that can only be spent to activate abilities

Cryptic Trilobite

Together Forever

Activate Skirk Prospector by sacrificing Scuzzback Marauders, adding {R}.
When Scuzzback Marauders dies, its persist ability triggers, returning it from your graveyard to the battlefield without a -1/-1 counter on it due to Uncivil Unrest.
Repeat.

Scuzzback Marauders

Activate Krark-Clan Ironworks by sacrificing Mister Gutsy, adding {C}{C}.
When Mister Gutsy dies, its second ability and Nim Deathmantle trigger.
Resolve the Mister Gutsy trigger, creating a number of Junk tokens equal to the number of +1/+1 counters that were on it.
If you created a Junk token, activate Krark-Clan Ironworks by sacrificing a Junk, adding {C}{C}.
Resolve the Nim Deathmantle trigger, causing you to pay {4} to return Mister Gutsy from your graveyard to the battlefield with a +1/+1 counter on it, and attaching Nim Deathmantle to it.
Repeat.

Mister Gutsy

Nim Deathmantle

Krark-Clan Ironworks

Cast Dargo from the command zone by paying {R}, causing it to enter the battlefield with a +1/+1 counter on it due to Uncivil Unrest.
Activate Dargo using Reckless Barbarian's ability by sacrificing it, adding {R}{R}.
Choose to return Dargo from your graveyard to the command zone.
Repeat.

Infinite commander casts

Dargo, the Shipwrecker

Agatha's Soul Cauldron

Reckless Barbarian

Activate Yidaro's cycling ability by paying {1}{R} and discarding it.
Yidaro triggers, putting it from your graveyard onto the battlefield with a +1/+1 counter on it due to Uncivil Unrest.
Resolve the Yidaro cycling ability, causing you to draw a card.
Activate Yidaro using Grinning Ignus's ability by paying {1} and returning Yidaro from the battlefield to your hand, adding {C}{C}{R}.
Repeat.

Combos with "Uncivil Unrest"