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

Prerequisites

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

Steps

1. Activate Llanowar Loamspeaker's second ability by tapping it, causing Minamo to become a 3/3 Elemental creature with haste that's still a land until end of 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