Mathandria, The Rebel

Flying, Deathtouch
When you cast Mathandria, exile all forests you
control. For each land exiled this way create
a 3/3 green elemental token with "When this
creature leaves play, return a land you own from
exile to play under your control"
{c}, Sacrifice an elemental: Search your library
for a forest and put it into play tapped.