Scythe of Karametra

Whenever a creature or land enters the
battlefield, you may gain 1 life.
{g}{w}, {t}: Choose one — Creatures you control
get either vigilance and reach or +1/+1 until
your next turn; or search your library for a
forest or plains card and put it onto the
battlefield tapped, then shuffle your library; or
you gain life equal to the number of lands you
control; or shuffle up to 3 target cards from a
graveyard into their owner's library.