Codie, Vociferous Codex | Rakdos, Lord of Riots | Lampad of Death's Vigil

(and one other card)

First Day of Class in hand.
All permanents on the battlefield.
Codie does not have summoning sickness.You have at least two opponents.
Opponents have lost at least 3 life this turn plus an additional 2 life for each time you've cast
Codie from the command zone this game, minus 1 life for each opponent you have beyond the second.
({5} magic symbol) ({R} magic symbol) available.

Cast
First Day of Class by paying ({1} magic symbol) ({R} magic symbol) .
Activate
Codie by paying ({4} magic symbol) and tapping it, adding ({W} magic symbol) ({U} magic symbol) ({B} magic symbol) ({R} magic symbol) ({G} magic symbol) .
Activate
Lampad of Death's Vigil by paying ({1} magic symbol) and sacrificing
Codie.
Choose to return
Codie to the command zone from your graveyard.
Resolve the
Lampad of Death's Vigil trigger, causing each opponent to lose 1 life and you to gain 1 life.
Cast
Codie from the command zone by paying ({0} magic symbol) due to
Rakdos.
First Day of Class triggers, putting a +1/+1 counter on
Codie and giving it haste.
Repeat from step 2.
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.
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} magic symbol) , outpacing the ({2} magic symbol) from commander tax, until you have two or less opponents.
Once you have a large number of
Codie triggers, you may cast any instant or sorcery 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 13 for each remaining trigger.