Folio of Fancies, Hullbreacher, and Time Sieve

Prerequisites

• Folio of Fancies on the battlefield
• Hullbreacher on the battlefield
• Time Sieve on the battlefield
• You have an amount of mana available each turn equal to five divided by the number of opponents you have, rounded up, multiplied by two

Steps

1. Activate Folio of Fancies by paying an amount of mana equal to five divided by the number of opponents you have, rounded up, multiplied by two and tapping it, causing you to draw cards equal to half the mana paid this way, and then causing you to create that many Treasure artifact tokens for each opponent you have
2. Activate Time Sieve by tapping it and sacrificing five Treasures, causing you to take an extra turn after this one
3. Repeat each turn

Results

• Near-infinite turns