Jenson Carthalion, Druid Exile, Mana Reflection, and Umbral Mantle

Prerequisites

• Jenson Carthalion, Druid Exile on the battlefield
• Mana Reflection on the battlefield
• Umbral Mantle on the battlefield
• available

Steps

1. Activate Jenson by paying and tapping it, adding
2. Activate Jenson by paying and untapping it, giving itself +2/+2 until end of turn
3. Repeat

Results

• Infinite colored mana
• Infinitely large Jenson Carthalion until end of turn
• Infinite untap of creatures you control
• Infinite mana creatures you control can produce
• Infinitely large creature until end of turn