Increase the Stakes

When Increase the Stakes enters the battlefield,
put X Time counters on it.
At the beginning of your upkeep, if you control
less than 5 Time counters, you lose 10 life.
At the beginning of your upkeep, if you control
more than 8 Time counters, you gain 10 life.
Whenever an opponent casts an Instant or Sorcery, remove a Time counter from Increase the Stakes.