Agrus Kos, Eternal Soldier + Soulbright Flamekin + Deflecting Swat + Felidar Guardian + Greenwarden of Murasa

5-card combo · RGW

Verdict

Yes — this 5-card loop generates infinite ETBs, infinite red mana, and infinite storm count once all pieces are on the battlefield.

Cards required: 5
Cheapest stack total: $96.49
Color identity: RGW
Popularity: 0 decks
Format: Commander

Buy required cards on TCGplayer

Agrus Kos, Eternal Soldier is the engine: every activated ability or triggered ability targeting him gets copied onto each other creature you control for 1 and a red-or-white mana. Soulbright Flamekin provides the mana to pay those copy costs by dumping eight red per activation, and Felidar Guardian blinks Soulbright Flamekin and Greenwarden of Murasa to reset the activation count. Greenwarden of Murasa recovers Deflecting Swat from the graveyard on each loop so the remaining Felidar Guardian triggers can be redirected to Agrus Kos and the cycle continues.

Recipe

How it works

Prerequisites

You control your commander. You have not activated Soulbright Flamekin's ability more than twice this turn.

Steps

Activate Soulbright Flamekin by paying , targeting Agrus Kos.
Agrus Kos triggers, causing you to pay to copy Soulbright Flamekin's ability targeting each other creature you control.
Resolve all Soulbright Flamekin triggers, giving the targeted creatures trample until end of turn and adding eight .
Cast Felidar Guardian by paying .
When Felidar Guardian enters the battlefield, it triggers, targeting Agrus Kos.
Agrus Kos triggers, causing you to pay to copy Felidar Guardian's trigger, targeting each other creature you control except Felidar Guardian.
Resolve the copies of Felidar Guardian's trigger targeting Soulbright Flamekin and Greenwarden of Murasa, blinking Soulbright Flamekin and Greenwarden of Murasa.
When Greenwarden of Murasa enters the battlefield, it triggers, returning Deflecting Swat from your graveyard to your hand.
Holding priority, activate Soulbright Flamekin by paying , targeting Agrus Kos.
Agrus Kos triggers, causing you to pay to copy Soulbright Flamekin's ability targeting each other creature you control.
Resolve all Soulbright Flamekin triggers, giving the targeted creatures trample until end of turn and adding eight .
Cast Deflecting Swat by paying , changing any of the remaining Felidar Guardian triggers not targeting Agrus Kos to target Agrus Kos instead.
Repeat from step 6.

Result

Infinite LTB; Infinite ETB; Infinite storm count; Infinite red mana; Infinite magecraft triggers; Infinite blinking

Variations

Cheaper, tighter, alternate lines

Deflecting Swat is the hardest piece to replace — any free or zero-cost spell that redirects a triggered ability works in the slot, but the options are narrow. Karmic Guide can substitute for Felidar Guardian as the blink piece since it returns a creature from the graveyard on ETB, though it shifts the color requirement to white-white on cast. The combo generates infinite red mana but no built-in kill; Purphoros, God of the Forge or a Walking Ballista already in play converts the infinite ETB loop into a win.