Marina, Leyline Shaper

Sprout (When this creature dies, search your library
for a basic land card and put it onto the battlefield
tapped. Then shuffle your library.)
Whenever a land enters the battlefield under your
control, you may untap it. If you don't, create a
1/1 blue butterfly creature token with flying.
{x}{x}{g}{u}, {t}: Create X 1/1 blue butterfly
creature tokens with flying. Draw a card.