Time Sieve + Descent into Avernus + Circle of Protection: Red

Time Sieve

Descent into Avernus

Circle of Protection: Red

How it works

1. At the beginning of your upkeep, Descent into Avernus triggers.
2. Holding priority, activate Circle of Protection: Red by paying 1, preventing the next amount of damage Descent into Avernus would deal you this turn.
3. Resolve the Descent into Avernus trigger, putting two descent counters on it, then causing each player to create a number of Treasure tokens equal to the number of descent counters on Descent into Avernus, and causing each opponent to be dealt an amount of damage equal to the number of descent counters on Descent into Avernus.
4. Activate Time Sieve by tapping it and sacrificing five Treasures, causing you to take an extra turn after this one.
5. Repeat each turn.