Gogo, Master of Mimicry, Invasion of Vryn // Overloaded Mage-Ring, High Tide, Retreat to Coralhelm, and Mythos of Illuna

Prerequisites

• Gogo, Master of Mimicry on the battlefield
• Invasion of Vryn // Overloaded Mage-Ring on the battlefield
• High Tide in hand
• Retreat to Coralhelm on the battlefield
• Mythos of Illuna in hand
• available

Steps

1. Cast High Tide by paying
2. Cast Mythos of Illuna by paying its mana cost, targeting an Island you control
3. Holding priority, activate Overloaded Mage-Ring by paying , tapping and sacrificing it, targeting the Mythos of Illuna spell
4. Holding priority, activate Gogo by paying and tapping it, copying the Overloaded Mage-Ring ability, targeting the Mythos of Illuna spell
5. Resolve the copy of Overloaded Mage-Ring's ability, copying the Mythos of Illuna spell, targeting an Island you control that enters the battlefield untapped
6. Resolve the copy of Mythos of Illuna, creating a token copy of the targeted Island
7. When the Island token enters, Retreat to Coralhelm triggers, untapping Gogo
8. Activate the Island token by tapping it, adding
9. High Tide triggers, adding
10. Repeat from step 4

Results

• Infinite magecraft triggers
• Infinite landfall triggers
• Infinite tapped Island tokens