Lashris, Mirage Isles

Fading 3
When Lashris enters a graveyard from the battlefield, you may sacrifice a basic island. If
you do, return Lashris to the battlefield.
{t}: Add {u}
{u}{u}, {t}: Look at the bottom three cards of your library. You may put any number of them on top
of your library in any order, then put the rest
back on the bottom of your library in any order.