Codie, Vociferous Codex + Rakdos, Lord of Riots + Lampad of Death's Vigil + Concordant Crossroads

Codie, Vociferous Codex

Rakdos, Lord of Riots

Lampad of Death's Vigil

Concordant Crossroads

How it works

1. Activate Codie by paying 4 and tapping it, adding .
2. Activate Lampad of Death's Vigil by paying 1 and sacrificing Codie.
3. Choose to return Codie to the command zone from your graveyard.
4. Resolve the Lampad of Death's Vigil trigger, causing each opponent to lose 1 life and you to gain 1 life.
5. Cast Codie from the command zone by paying 0 due to Rakdos.
6. Repeat.
7. NOTE: This combo ends once you have one opponent remaining, as the lifeloss from Lampad of Death's Vigil no longer covers Codie's increased commander tax.
8. However, you may be able to get more iterations if you started the combo with three or more opponents, as Rakdos will decrease Codie's cost by 3, outpacing the 2 from commander tax, until you have two or less opponents.
9. Once you have a large number of Codie triggers, you may cast any instant or sorcery by paying its mana cost.
10. Codie triggers for each time you activated its ability.
11. 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.
12. Repeat step 11 for each remaining trigger.

This looping masterpiece relies on Rakdos, Lord of Riots to completely slash the casting cost of Codie, Vociferous Codex based on the life your opponents have lost. By sacrificing Codie to Lampad of Death's Vigil, you trigger life loss that fuels Rakdos's cost reduction, allowing you to recast Codie from the command zone for free. Concordant Crossroads ensures that Codie (along with any other creatures you control) can immediately tap the moment it re-enters the battlefield, letting you repeat this sacrifice loop to generate a massive storm count and trigger Codie's ability over and over again.