Auric Shepherdess Selene

Whenever Auric Shepherdess Selene enters the
battlefield or attacks, you may tap up to one
target creature. If you do, gain life equal to the
power of this creature.
At the beginning of your end step, if you have
gained 5 or more life this turn, you may search
your library for a creature card with converted
mana cost 3 or less, reveal it, and put it into your
hand. Then shuffle your library.