Felidar Guardian + Flameshadow Conjuring

Prerequisites

You control a permanent that enters the battlefield untapped and can tap to produce at least {R}.

Steps

1. Cast Felidar Guardian by paying {3}{W}.
2. Felidar Guaridan enters the battlefield, triggering itself and Flameshadow Conjuring.
3. Holding priority, activate the mana-producing permanent by tapping it, adding at least {R}.
4. Resolve the Felidar Guardian trigger, blinking the mana-producing permanent.
5. Resolve the Flameshadow Conjuring trigger, causing you to pay {R} to create a token copy of Felidar Guardian with haste.
6. The Felidar Guardian token enters the battlefield, blinking the nontoken Felidar Guardian.
7. Repeat from step 2.