Aftermath Analyst | Takenuma, Abandoned Mire | Squandered Resources (and one other card)

Cards

You control lands that can tap to produce at least ({7} magic symbol) ({G} magic symbol) ({G} magic symbol) ({B} magic symbol) (but see notes).

Activate
Squandered Resources by sacrificing each land you control, adding at least ({7} magic symbol) ({G} magic symbol) ({G} magic symbol) ({B} magic symbol) .
Activate
Aftermath Analyst by paying ({3} magic symbol) ({G} magic symbol) and sacrificing it, returning all land cards from your graveyard to the battlefield tapped.
When
Azorius Chancery enters the battlefield, it triggers, returning
Takenuma from the battlefield to your hand.
Activate
Takenuma's channel ability by paying at most ({3} magic symbol) ({B} magic symbol) , milling three cards and returning
Aftermath Analyst from your graveyard to your hand.
Cast
Aftermath Analyst by paying ({1} magic symbol) ({G} magic symbol) .
When
Aftermath Analyst enters, it triggers, causing you to mill three cards.
Repeat.

Each legendary creature you control reduces the amount of mana required by ({1} magic symbol) , up to a maximum of ({3} magic symbol) . Each loop also has a chance to generate more mana than the one before it due to additional milled lands, so if you have excess mana you can begin the loop without the required number of lands and have a chance to achieve the infinite loop through milling.

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