Codie, Vociferous Codex + Voltaic Construct + Training Grounds

Prerequisites

• Codie does not have summoning sickness.

Steps

1. 1Activate Codie by paying and tapping it, adding .
2. 2Activate Voltaic Construct by paying , untapping Codie.
3. 3Repeat.
4. 4Once you have an arbitrarily large number of Codie triggers, you may cast any instant or sorcery spell by paying its mana cost.
5. 5Codie triggers for each time you activated its ability.
6. 6Resolve 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.
7. 7Repeat step 6 for each remaining trigger.
8. 8You may also repeat this combo for each instant and/or sorcery card in your hand, and on subsequent turns.

Effects

• Cast a subset of spells in your library
• Infinite colored mana
• Infinite untap of artifact creatures you control