Agrus Kos, Eternal Soldier + Soulbright Flamekin + Deflecting Swat + Felidar Guardian + Scrivener

5-card combo · URW

Verdict

Yes — this 5-card loop generates infinite ETBs, infinite red mana, and infinite storm count in a Jeskai shell that can close with almost any mana sink or cast-trigger payoff.

Cards required: 5
Cheapest stack total: $71.99
Color identity: URW
Popularity: 0 decks
Format: Commander

Buy required cards on TCGplayer

Agrus Kos, Eternal Soldier is the engine: every activated ability or triggered ability paid through him copies across all creatures you control, which is how a single Soulbright Flamekin activation nets eight red and how Felidar Guardian's blink trigger hits Scrivener to recur Deflecting Swat each cycle. Scrivener returning Deflecting Swat for free is the loop's glue — without it, the Felidar Guardian trigger chain collapses after the first pass. This sits in a dedicated Agrus Kos commander deck; the five-card requirement is steep enough that you're building around the general rather than slotting this into a generic Jeskai pile.

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 Scrivener, blinking Soulbright Flamekin and Scrivener.
When Scrivener 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 bottleneck — without a way to recycle it through Scrivener and the blink chain each iteration, the loop doesn't sustain, so protecting that graveyard recursion line is the build's first priority. Walking Ballista or Torment of Hailfire are the natural closers once red mana goes infinite; Aetherflux Reservoir converts the storm count directly into a table kill if the mana sink is unavailable.