Gogo, Master of Mimicry + High Tide + Retreat to Coralhelm + Thousand-Year Storm + Mythos of Illuna

Gogo, Master of Mimicry

High Tide

Retreat to Coralhelm

Thousand-Year Storm

Mythos of Illuna

How it works

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

This mesmerizing loop turns a modest land drop into an engine of endless multiplication by weaving together a cascade of triggers and untaps. It begins with High Tide doubling your blue mana production, providing the fuel you need to cast Mythos of Illuna and set up the storm count. As Thousand-Year Storm watches your spells accumulate, Gogo, Master of Mimicry steps in to actively multiply those storm triggers, allowing you to copy Mythos of Illuna over and over again to flood the board with Island tokens. Every single token that enters the battlefield triggers Retreat to Coralhelm, whose landfall ability untaps Gogo so you can keep copying and repeating the entire sequence for infinite mana and permanent copies.