Gogo, Master of Mimicry, and Minamo, School at Water's Edge

Prerequisites

• Gogo, Master of Mimicry on the battlefield
• Minamo, School at Water's Edge on the battlefield
• plus enough mana to activate or trigger the untap ability available

Steps

1. Activate or trigger the ability that will untap at least five lands you control
2. In response, activate Gogo by paying and tapping them, copying that ability once
3. Resolve that ability, untapping Minamo, any land that produces , and at least three other lands
4. Activate Minamo's last ability by paying and tapping it, untapping Gogo
5. Activate your remaining untapped lands, adding at least three mana
6. Repeat from step 2 any number of times
7. Once you have infinite mana, you can activate Gogo any number of times on any valid abilities for any value of X, also allowing you to infinitely untap any number of legendary permanents with Minamo

Results

• Infinite copies of abilities you control on the stack
• Infinite mana lands you control can produce
• Infnite untap of legendary permanents