Jinnie Fay, Jetmir's Second + Breath of Fury + Guild Artisan
Jinnie Fay, Jetmir's Second
Breath of Fury
Guild Artisan
Infinite artifact ETBInfinite artifact LTBInfinite artifact sacrifice triggersInfinite artifact tokensInfinite colored manaInfinite combat damageInfinite combat phasesInfinite creature tokens with hasteInfinite death triggersInfinite creature ETBInfinite creature LTBInfinite mana creatures you control can produceInfinite creature sacrifice triggersInfinite Treasure tokensInfinite untap of creatures you control
How it works
Declare the creature with Breath of Fury attached and your commander as attackers, attacking the opponent with the highest life total among your opponents or an opponent that is tied for the highest life total among your opponents.
Your commander triggers, creating two 2/2 Cat creature tokens with haste due to Jinnie Fay.
Deal combat damage using the creature that has Breath of Fury attached.
Breath of Fury triggers, causing you to sacrifice the creature it is attached to, then attach Breath of Fury to the Cat token, then causing you to untap all creatures you control and to get an additional combat phase after this one.
Repeat each combat phase.
Once you have infinite Cat tokens, you may instead make Dog tokens using Jinnie Fay or Treasure tokens.
This loop turns your commander into an endless engine of war by leveraging Breath of Fury to chain infinitely additional combat phases. With Guild Artisan on the field, your commander creates a pair of Treasure tokens whenever it attacks the player with the highest life total, and Jinnie Fay, Jetmir's Second steps in to convert those influxes of treasure into hasty 2/2 Cat tokens. You then attach Breath of Fury to one of those newly minted cats so that when it deals combat damage, you can sacrifice it to untap your entire board and restart the cycle with a fresh token. Because Jinnie Fay, Jetmir's Second also gives you the flexibility to make Dog tokens, and Guild Artisan keeps the mana flowing, you easily generate infinite combat phases, tokens, and resources to overwhelm the table.