Springheart Nantuko + Overlord of the Hauntwoods + Spelunking + Mana Flare

Springheart Nantuko

Overlord of the Hauntwoods

Spelunking

Mana Flare

How it works

1. Declare Overlord of the Hauntwoods as an attacker.
2. Overlord of the Hauntwoods triggers, creating an untapped Everywhere land token due to Spelunking.
3. When the Everywhere token enters the battlefield, Springheart Nantuko triggers.
4. Holding priority, activate Everywhere by tapping it, adding .
5. Mana Flare triggers, adding .
6. Resolve the Springheart Nantuko trigger, causing you to pay 1 to create a token copy of Overlord of the Hauntwoods.
7. When the Overlord of the Hauntwoods token enters the battlefield, it triggers, creating a tapped Everywhere land token.
8. Repeat from step 3.

This brilliant loop starts when Overlord of the Hauntwoods attacks, triggering to create a land token. Thanks to Spelunking, that token and any subsequent lands enter the battlefield untapped, allowing you to immediately tap the Everywhere token for mana. Mana Flare doubles that output, generating the exact mana needed to satisfy Springheart Nantuko's landfall ability when it triggers off the new land's arrival. Paying that cost lets you create a token copy of Overlord of the Hauntwoods, which in turn triggers its own entry ability to start the cycle anew, snowballing into an endless army of attackers and land tokens.