Activate Plate Armor's equip ability by paying {0}, targeting Crackdown Construct.
Crackdown Construct triggers, giving itself +1/+1 until end of turn.
Resolve the Plate Armor ability, attaching it to Crackdown Construct.
Repeat.

Infinitely large Crackdown Construct until end of turn

Crackdown Construct

Plate Armor

Activate Plate Armor's equip ability by paying {0}, targeting the affinity creature.
Monk Gyatso triggers, airbending the targeted creature.
The Plate Armor ability fizzles due to no longer having a legal target.
Cast the creature from exile by paying {0} due to its affinity ability.
Repeat.

Infinite LTB

Infinite ETB

Infinite storm count

Creature with Affinity

Monk Gyatso

Activate Plate Armor's equip ability by paying {0}, targeting another nontoken creature you control.
Monk Gyatso triggers, airbending the targeted creature.
The Plate Armor ability fizzles due to no longer having a legal target.
Cast the creature from exile by paying {0} due to Semblance Anvil.
Repeat.

Semblance Anvil

Activate Plate Armor's equip ability by paying {0}, targeting Cephalid Illusionist.
Cephalid Illusionist triggers, causing you to mill three cards.
Resolve the Plate Armor ability, attaching it to Cephalid Illusionist.
Repeat.

Infinite self-mill

Cephalid Illusionist

Activate Plate Armor's equip ability by paying {0}, targeting Cephalid Aristocrat.
Cephalid Aristocrat triggers, causing you to mill two cards.
Resolve Plate Armor's ability, attaching it to Cephalid Aristrocrat.
Repeat.

Cephalid Aristocrat

Activate Plate Armor's equip ability by paying {0}, targeting Priest of Urabrask.
Monk Gyatso triggers, airbending Priest of Urabrask.
The Plate Armor ability fizzles due to no longer having a legal target.
Cast Priest of Urabrask from exile by paying {2}.
When Priest of Urabrask enters, it triggers, adding {R}{R}{R}.
Repeat.

Infinite red mana

Priest of Urabrask

Activate Plate Armor's equip ability by paying {0}, targeting Daru Spiritualist.
Daru Spiritualist triggers, causing itself to get +0/+2 until end of turn.
Resolve the Plate Armor ability.
Repeat an arbitrarily large number of times.
Activate Starlit Sanctum's second ability by paying {W}, tapping it and sacrificing Daru Spiritualist, causing you to gain life equal to Daru Spiritualist's toughness.

Combos with "Plate Armor"