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

Prerequisites

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

Steps

1. Activate Roaring Earth by paying and discarding it, causing Minamo to become a 0/0 Spirit creature with haste that's still a land, and putting a +1/+1 counter on it
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