Springheart Nantuko | Overlord of the Hauntwoods | Nissa, Resurgent Animist (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,
Springheart Nantuko and
Nissa each trigger twice.
Resolve both
Nissa triggers, adding ({1} magic symbol) ({G} magic symbol) .
Resolve the first
Springheart Nantuko trigger, choosing not to pay and creating two 1/1 Insect creature tokens.
Resolve the second
Springheart Nantuko trigger, causing you to pay ({1} magic symbol) ({G} magic symbol) to create two token copies of
Overlord of the Hauntwoods.
When the
Overlord of the Hauntwoods tokens enters the battlefield, they trigger.
Resolve the first trigger, creating two tapped Everywhere land tokens.
Repeat from step 3.

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