Gogo, Master of Mimicry, High Tide, Retreat to Coralhelm, Mythos of Illuna, and Invasion of Arcavios // Invocation of the Founders

Prerequisites

• Gogo, Master of Mimicry on the battlefield
• High Tide in hand
• Retreat to Coralhelm on the battlefield
• Mythos of Illuna in hand
• Invasion of Arcavios // Invocation of the Founders on the battlefield
• available

Steps

1. Cast High Tide by paying
2. Cast Mythos of Illuna by paying its mana cost, targeting an Island you control
3. Invocation of the Founders triggers
4. Holding priority, activate Gogo by paying and tapping it, copying the Invocation of the Founders ability
5. Resolve the copy of Invocation of the Founders'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