Descent into AvernusAt the beginning of your upkeep, put two descent counters on Descent into Avernus. Then each player creates X Treasure tokens and Descent into Avernus deals X damage to each player, where X is the number of descent counters on Descent into Avernus.

(Choose any number of permanents and/or players

At the beginning of each end step

first strike

Creatures your opponents control enter tapped

Destroy all tapped creatures

and protection from each color until end of turn

protection

You may exile a blue card with mana value X from your hand rather than pay this spell's mana cost

put two descent counters on Descent into Avernus

put a -1/-1 counter on each creature target player controls

discover 5

put that card onto the battlefield