Pyromancer's Goggles + Flare of Duplication

Prerequisites

You have an additional instant or sorcery card in hand with the mana to cast it. You control a nontoken red creature or have an additional {1}{R} available.

Steps

1. Cast any instant or sorcery by paying its mana cost.
2. Holding priority, activate Pyromancer's Goggles by tapping it, adding {R}.
3. Cast Flare of Duplication by paying its mana cost or by sacrificing a nontoken red creature, targeting the instant or sorcery cast in step 1.
4. Pyromancer's Goggles triggers, copying Flare of Duplication, with the copy targeting the original Flare of Duplication.
5. Resolve the copy of Flare of Duplication, creating a copy of Flare of Duplication targeting the original Flare of Duplication.
6. Repeat step 5.