Biollante, Earthly Horror

When Biollante, Earthly Horror enters the battlefield, create a 0/1 green Plant creature token
for each land you control.
{b}{r}{g}, Sacrifice X Plants: Mill X cards and gain
X life. Put a +1/+1 counter on Biollante, Earthly Horror for each land card milled this way. Then,
if there are 10 or more lands in your graveyard, transform this Biollante, Earthly Horror.