Kiryl's Coin

At the beginning of your upkeep, you may flip a
coin. If you don't, put a curse counter on Kiryl's
Coin.
Whenever you flip a coin, if you win the flip, each
opponent loses X life and you gain X life, where
X is the number of curse counters on Kiryl's
Coin. If you lose the flip, you lose X life, where
X is the number of curse counters on Kiryl's
Coin.