Emmara, Soul of the Accord, Intruder Alarm, and Cryptolith Rite

Prerequisites

• Emmara, Soul of the Accord on the battlefield
• Intruder Alarm on the battlefield
• Cryptolith Rite on the battlefield
• Emmara does not have summoning sickness

Steps

1. Activate Emmara by tapping it, adding one mana of any color
2. Emmara triggers, creating a 1/1 Human Warrior creature token
3. The Human Warrior enters the battlefield, triggering Intruder Alarm, untapping all creatures
4. Repeat

Results

• Infinite colored mana
• Infinite creature tokens
• Infinite ETB