Springheart Nantuko | Overlord of the Hauntwoods | Amulet of Vigor (and one other card)

Cards

Declare
Overlord of the Hauntwoods as an attacker.
Overlord of the Hauntwoods triggers, creating two tapped Everywhere land tokens.
When the Everywhere tokens enter the battlefield,
Amulet of Vigor and
Springheart Nantuko trigger twice.
Resolve both
Amulet of Vigor triggers, untapping both Everywhere tokens.
Holding priority, activate the Everywhere tokens by tapping them, adding ({1} magic symbol) ({G} magic symbol) .
Resolve the first
Springheart Nantuko trigger, choosing not to pay and create a 1/1 Insect creature token.
Resolve the second
Springheart Nantuko trigger, causing you to pay ({1} magic symbol) ({G} magic symbol) to create a token copy of
Overlord of the Hauntwoods.
When the
Overlord of the Hauntwoods token enters the battlefield, it triggers, creating two tapped Everywhere land tokens.
Repeat from step 3.

This combo has been estimated to be Exhibition (Bracket 1+).