Springheart Nantuko + Mutable Explorer + Spelunking + Lotus Cobra

Springheart Nantuko

Mutable Explorer

Spelunking

Lotus Cobra

How it works

1. Play a land.
2. When the land enters, Springheart Nantuko triggers, causing you to pay 1 to create a token copy of Mutable Explorer.
3. When the Mutable Explorer token enters, it triggers, creating a Mutavault land token that enters untapped due to Spelunking.
4. When the Mutavault token enters, Springheart Nantuko and Lotus Cobra trigger.
5. Holding priority, activate the Mutavault token by tapping it, adding C.
6. Resolve the Lotus Cobra trigger, adding .
7. Resolve the Springheart Nantuko trigger, causing you to pay 1 to create a token copy of Mutable Explorer.
8. Repeat from step 3.

This brilliant loop feeds on itself by turning land drops into an endless cascade of creature creation and mana generation. It all kicks off when you play a land, triggering Springheart Nantuko to copy your original Mutable Explorer. Because Spelunking ensures every land enters the battlefield untapped, the Mutavault token created by the new Mutable Explorer can immediately be tapped for colorless mana, which combines with the mana from Lotus Cobra's landfall trigger to pay for Springheart Nantuko's continuous copy cost. You are left with an unstoppable loop that floods the board with infinite token copies, endless landfall triggers, and an army of Mutavaults.