Time or Life

Whenever a creature enters the battlefield under
your control, put a time counter on Time or Life.
Whenever a creature enters the battlefield under
an opponents control, put a life counter on Time
or Life. If there are at least 5 or more time or life
counters on Time or Life, you may sacrifice it. If
there were more time counters, take an extra turn
after this one. If there were more life counters,
you gain life and draw cards equal to the number
of creature you control.