Activate Krark-Clan Ironworks by sacrificing Spirit Loop, adding {2}.
Spirit Loop's second ability triggers, returning itself to your hand from your graveyard.
Cast Spirit Loop by paying {2}, attaching it to a creature you control.
Repeat.

Infinite storm count

Mycosynth Lattice

Krark-Clan Ironworks

Spirit Loop

Activate Faith Healer by sacrificing Spirit Loop.
Spirit Loop triggers, returning it from your graveyard to your hand.
Resolve the Faith Healer ability, causing you to gain two life.
Cast Spirit Loop by paying two life, targeting any creature.
Defiler of Faith triggers, creating a 1/1 Soldier creature token.
Repeat.

Infinite creature tokens

Infinite ETB

Defiler of Faith

Faith Healer

Transcendent Envoy

Starnheim Courser

Activate Faith Healer by sacrificing Spirit Loop.
Spirit Loop and Starfield Mystic triggers.
Resolve the Starfield Mystic trigger, putting a +1/+1 counter on it.
Resolve the Spirit Loop trigger, returning it from your graveyard to your hand.
Resolve the Faith Healer ability, causing you to gain two life.
Cast Spirit Loop by paying two life, targeting any creature.
Defiler of Faith triggers, creating a 1/1 Soldier creature token.
Repeat.

Infinite +1/+1 counters on a creature

Starfield Mystic

Activate Faith Healer by sacrificing Spirit Loop.
Spirit Loop triggers, returning it from your graveyard to your hand.
Resolve the Faith Healer ability, causing you to gain two life.
Cast Spirit Loop by paying two life, targeting Hero of Iroas.
Defiler of Faith and Hero of Iroas triggers.
Resolve the Hero or Iroas trigger, putting a +1/+1 counter on it.
Resolve the Defiler of Faith trigger, creating a 1/1 Soldier creature token.
Repeat.

Combos with "Spirit Loop"