Springheart Nantuko | Mutable Explorer | The Wandering Minstrel (and one other card)

Cards

All permanents on the battlefield (
Springheart Nantuko attached to
Mutable Explorer).

Play a land.
When the land enters,
Springheart Nantuko triggers, causing you to pay ({1} magic symbol) ({G} magic symbol) to create a token copy of
Mutable Explorer.
When the
Mutable Explorer token enters, it triggers, creating a Mutavault land token that enters untapped due to
The Wandering Minstrel.
When the Mutavault token enters,
Springheart Nantuko and
Tireless Provisioner trigger.
Holding priority, activate the Mutavault token by tapping it, adding ({C} magic symbol) .
Resolve the
Tireless Provisioner trigger, creating a Treasure token.
Holding priority, activate the Treasure by tapping and sacrificing it, adding ({G} magic symbol) .
Resolve the
Springheart Nantuko trigger, causing you to pay ({1} magic symbol) ({G} magic symbol) to create a token copy of
Mutable Explorer.
Repeat from step 3.

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