Agrus Kos, Eternal Soldier, Soulbright Flamekin, Deflecting Swat, Felidar Guardian, and Returned Pastcaller

Prerequisites

• Agrus Kos, Eternal Soldier on the battlefield
• Soulbright Flamekin on the battlefield
• Deflecting Swat in the graveyard
• Felidar Guardian in hand
• Returned Pastcaller on the battlefield
• You control your commander
• You have not activated Soulbright Flamekin's ability more than twice this turn
• available

Steps

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

Results

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