Dualcaster Mage, and Twinflame

Prerequisites

• Dualcaster Mage on the battlefield
• Twinflame in hand
• You control at least one creature
• You have enough mana to cast Twinflame available

Steps

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

Results

• Infinite ETB
• Infinite magecraft triggers
• Infinite LTB
• Infinite creature tokens with haste