Springheart Nantuko, Mutable Explorer, Archelos, Lagoon Mystic, and Lotus Cobra

Prerequisites

• Springheart Nantuko on the battlefield
• Mutable Explorer on the battlefield
• Archelos, Lagoon Mystic on the battlefield
• Lotus Cobra on the battlefield
• available

Steps

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

Results

• Infinite ETB
• Infinite creature tokens
• Infinite landfall triggers
• Infinite tapped Mutavault land tokens