When Peregrine Drake enters the battlefield, it and Flameshadow Conjuring trigger.
Resolve the Peregrine Drake trigger, untapping up to five lands you control.
Activate up to five lands you control by tapping them, adding at least ({1} magic symbol) ({U} magic symbol) ({R} magic symbol) ({G} magic symbol) .
Resolve the Flameshadow Conjuring trigger, causing you to pay ({R} magic symbol) to create a token copy of Peregrine Drake with haste.
When the token Peregrine Drake enters the battlefield, it triggers, untapping up to five lands you control.
Activate Temur Sabertooth by paying ({1} magic symbol) ({G} magic symbol) , returning the nontoken Peregrine Drake from the battlefield to your hand.
Repeat.
If you control up to five lands that can tap to produce at least ({2} magic symbol) ({U} magic symbol) ({R} magic symbol) ({G} magic symbol) , this combo nets infinite mana.