Ioreth of the Healing House, Arixmethes, Slumbering Isle, Minamo, School at Water's Edge, and Wrenn and Realmbreaker

Prerequisites

• Ioreth of the Healing House on the battlefield
• Arixmethes, Slumbering Isle on the battlefield
• Minamo, School at Water's Edge on the battlefield
• Wrenn and Realmbreaker on the battlefield
• Ioreth of the Healing House does not have summoning sickness
• Arixmethes is a creature and does not have summoning sickness

Steps

1. Activate Wrenn and Realmbreaker's first loyalty ability by putting a loyalty counter on it, causing Minamo to become a 3/3 Elemental creature with vigilance, hexproof and haste that's still a land until your next turn
2. Activate Arixmethes by tapping it, adding
3. Activate Minamo's second ability by paying and tapping it, untapping Ioreth of the Healing House
4. Activate Ioreth of the Healing House's second ability by tapping it, untapping Minamo and Arixmethes
5. Repeat from step 2

Results

• Infinite green mana