Radiant Lifegem

: Radiant Lifegem enters the battlefield with 6 time counters on it.
At the beginning of your upkeep, remove a time counter from Radiant Lifegem. If Radiant Lifegem has no time counters on it, sacrifice Radiant Lifegem and gain 5 life.
Whenever you remove a time counter from Radiant Lifegem, you gain 5 life.