There and Back Again, and Vitu-Ghazi Guildmage

Prerequisites

• There and Back Again on the battlefield
• Vitu-Ghazi Guildmage on the battlefield
• There and Back Again has exactly two lore counters on it
• available

Steps

1. At the beginning of your precombat main phase, There and Back Again triggers, putting a lore counter on it
2. There and Back Again's third chapter ability triggers, creating a legendary 6/6 Smaug creature token and causing you to sacrifice There and Back Again
3. Activate Vitu-Ghazi Guildmage's second ability by paying , creating a copy of the Smaug token
4. Put one of the Smaug tokens into your graveyard due to the legend rule
5. When the Smaug dies, it triggers, creating fourteen Treasure tokens
6. Activate four Treasures by tapping and sacrificing them, adding
7. Repeat from step 3
8. Once you have infinite mana, you may create infinite 3/3 Centaurs and/or copies of any tokens you control instead

Results

• Infinite colored mana
• Infinite copies of all tokens you control
• Infinite creature tokens
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite Treasure tokens