World Shaper | Takenuma, Abandoned Mire | Squandered Resources

(and two other cards)

You control at least three mana-producing lands, plus three in any combination of additional mana-producing lands and/or legendary creatures.

Activate
Squandered Resources by sacrificing
Rakdos Carnarium, adding ({B} magic symbol) .
Repeat step 1 for each remaining mana-producing land you control.
Activate
Phyrexian Altar by sacrificing
World Shaper, adding ({G} magic symbol) .
When
World Shaper dies, its second ability triggers, causing you to return all land cards from your graveyard to the battlefield tapped.
When
Rakdos Carnarium 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) , causing you to mill three cards and return
World Shaper from your graveyard to your hand.
Cast
World Shaper by paying ({3} magic symbol) ({G} magic symbol) .
Repeat.
If you control additional mana-producing lands beyond what is required, this combo nets infinite colored mana if one of those lands produces ({B} magic symbol) or ({G} magic symbol) , or infinite mana lands you control can produce otherwise.