Rapid, Ravager of Time

Whenever this creature kills an enemy creature give Rapid, Ravager of Time a windup counter.
{ut}Remove 8 windup counters. Take an extra turn. Replace ability with: Whenever this creature kills a creature you control, add a time counter.
{ut}Remove 3 time counters. Revert to old ability.
{p/r}Deal 3 damage to target creature.
I am like a pendulum, first I swing one way, and then the other. The only thing you can rely on... chaos!