Era and Viz, Eternal Conflict

Pay {x} life: Activate only if your life is greater
than your starting life total. X is equal to the
difference between your life and your starting
life. Place X +1/+1 counters on target creature
Sacrifice a creature: Activate only if your life is
less than your starting life. Gain life equal to the
sacrificed creature's toughness. Then if your life
total is greater than your starting life create a
token copy of the sacrificed creature.