Agrus Kos triggers, causing you to pay ({1} magic symbol) ({RW} magic symbol) 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 ({R} magic symbol) .
When Felidar Guardian enters the battlefield, it triggers, targeting Agrus Kos.
Agrus Kos triggers, causing you to pay ({1} magic symbol) ({RW} magic symbol) 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 Ardent Elementalist, blinking Soulbright Flamekin and Ardent Elementalist.
When Ardent Elementalist enters the battlefield, it triggers, returning Deflecting Swat from your graveyard to your hand.
Agrus Kos triggers, causing you to pay ({1} magic symbol) ({RW} magic symbol) 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 ({R} magic symbol) .
Cast Deflecting Swat by paying ({0} magic symbol) , changing any of the remaining Felidar Guardian triggers not targeting Agrus Kos to target Agrus Kos instead.