Activate Sanctum Weaver by tapping it, adding at least {U}{U}{U}{U}{U}.
Activate Thassa's Ire by paying {3}{U}, untapping Sanctum Weaver.
Repeat.

Infinite colored mana

Infinite mana creatures you control can produce

Infinite untap of creatures you control

Sanctum Weaver

Thassa's Ire

Activate Codie by paying {1} and tapping it, adding {W}{U}{B}{R}{G}.
Activate Thassa's Ire by paying {3}{U}, untapping Codie.
Repeat as desired, skipping step 2 on the final iteration.
Once you have an arbitrarily large number of Codie triggers, cast any spell by paying its mana cost, reduced by the {W}{U}{B}{R}{G} added in step 1.
Codie triggers for each time you activated its ability.
Resolve the first trigger, causing you to exile cards from the top of your library until you exile an instant or sorcery spell with lesser mana value, and allowing you to cast that spell without paying its mana cost.
Repeat step 6 for each remaining trigger.
You may also repeat this combo for each instant and/or sorcery card in your hand as mana permits, and on subsequent turns.

Cast a subset of spells in your library

Codie, Vociferous Codex

Agatha of the Vile Cauldron

Activate Codie by paying {2} and tapping it, adding {W}{U}{B}{R}{G}.
Activate Thassa's Ire by paying {1}{U}, untapping Codie.
Repeat.
Once you have an arbitrarily large number of Codie triggers, you may cast any instant or sorcery spell by paying its mana cost.
Codie triggers for each time you activated its ability.
Resolve the first trigger, causing you to exile cards from the top of your library until you exile an instant or sorcery spell with lesser mana value, and allowing you to cast that spell without paying its mana cost.
Repeat step 6 for each remaining trigger.
You may also repeat this combo for each instant and/or sorcery card in your hand, and on subsequent turns.

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