Dualcaster Mage + Self-Reflection

Prerequisites

You control at least one creature. You have enough mana to cast Self-Reflection

Steps

1. Cast Self-Reflection by paying its mana cost, targeting a creature you control.
2. Holding priority, cast Dualcaster Mage by paying {1}{R}{R}.
3. When Dualcaster Mage enters the battlefield, it triggers, copying Self-Reflection, targeting Dualcaster Mage.
4. Resolve the copy of Self-Reflection, creating a token copy of Dualcaster Mage.
5. Repeat from step 3.