Kindle the Inner Flame

Kindle the Inner Flame is legal across every major constructed format but sees essentially zero competitive play outside Commander — the effect is too narrow for formats where creature-copy loops need to close a game faster and more reliably. In Commander, it earns its slot almost exclusively through the Dualcaster Mage interaction, where any instant that makes a copy becomes a two-card infinite loop when Dualcaster flashes in targeting it. Outside that combo context, Kindle the Inner Flame is a serviceable haste enabler in red aggro or attack-trigger decks, and the token copy it generates until end of turn occasionally matters for combat math. Oathbreaker is the only non-Commander format where the combo angle could realistically show up, but the singleton constraint keeps it fringe there too.