Descent into Avernus has at least two descent counters on it.
Mana Needed
({4} magic symbol) available.
Steps
At the beginning of your upkeep,
Descent into Avernus triggers.
Holding priority, activate
The Stasis Coffin by paying ({2} magic symbol) , tapping and exiling it, giving you protection from everything until end of turn.
Activate
Strionic Resonator by paying ({2} magic symbol) and tapping it, copying
Descent into Avernus' ability.
Resolve the copy of
Descent into Avernus' ability, 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 it, and then deal that much damage to each opponent.
Activate
Clock of Omens by tapping two Treasures, untapping
Strionic Resonator.
Activate two Treasures by tapping and sacrificing them, adding ({2} magic symbol) .