Agatha of the Vile Cauldron, Magus of the Candelabra, and Umbral Mantle

Prerequisites

• Agatha of the Vile Cauldron on the battlefield
• Magus of the Candelabra on the battlefield
• Umbral Mantle on the battlefield
• Agatha of the Vile Cauldron has power 2 or greater
• You control up to three lands that can tap to produce at least
• Magus of the Candelabra does not have summoning sickness
• Umbral Mantle attached to Magus of the Candelabra

Steps

1. Activate up to three lands by tapping them, adding at least
2. Activate Magus of the Candelabra by tapping it and paying due to Agatha of the Vile Cauldron, untapping the five lands
3. Activate Magus of the Candelabra by paying due to Agatha of the Vile Cauldron and untapping it, giving itself +2/+2 until end of turn
4. Repeat
5. Once you have infinite mana, if you have infinite and , you may use it to activate Agatha of the Vile Cauldron's ability

Results

• Infinitely large creatures until end of turn except Agatha of the Vile Cauldron
• Infinite mana lands you control can produce
• Infinite untap of lands you control