Vitasius, Goddess of Mortality

Lifelink
At the beginning of each end step, if you gained 5
or more life this turn, put a worship counter on
this card.
{1}{w}{b},{t}:Each opponent loses X life, where X is
the number of worship counters of this card. You
gain life equal to the life lost this way.
If this card would be destroyed, put it on top of
it's owners library.
"Life is valuable, unfortunately, you don't
deserve yours."