Springheart Nantuko + Overlord of the Hauntwoods + Archelos, Lagoon Mystic + Exalted Sunborn

Springheart Nantuko

Overlord of the Hauntwoods

Archelos, Lagoon Mystic

Exalted Sunborn

How it works

1. Declare Overlord of the Hauntwoods as an attacker.
2. Overlord of the Hauntwoods triggers, creating two untapped Everywhere land tokens due to Archelos.
3. When the Everywhere tokens enter the battlefield, Springheart Nantuko triggers twice.
4. Holding priority, activate the Everywhere tokens by tapping them, adding 1.
5. Resolve the first Springheart Nantuko trigger, choosing not to pay and creating two 1/1 Insect creature tokens.
6. Resolve the second Springheart Nantuko trigger, causing you to pay 1 to create two token copies of Overlord of the Hauntwoods.
7. When the Overlord of the Hauntwoods tokens enters the battlefield, they trigger.
8. Resolve the first trigger, creating two untapped Everywhere land tokens due to Archelos.
9. Repeat from step 3.

This loop transforms a single attack by Overlord of the Hauntwoods into an overwhelming cascade of value. As the Overlord attacks, its trigger normally makes a land token, but with Exalted Sunborn on the board doubling your token creation, you instead get two Everywhere tokens which enter the battlefield untapped thanks to Archelos, Lagoon Mystic's static ability. Those entries trigger Springheart Nantuko twice, allowing the mana generated by tapping the Everywhere tokens to pay for copying the Overlord over and over. Because Exalted Sunborn ensures every token-doubling effect and token-copying trigger multiplies your yield, you quickly spiral out of control into an infinite loop of landfalls, mana, and creature tokens.