March to the Sea

At the beginning of your upkeep, you may
sacrifice a non-island land. If you do, put a march
counter on March to the Sea and scry 1. If the
scried card is a land card, you may put it on the
battlefield.
At the end of your end step, if there are 5 or more
march counters on March to the Sea, exile it,
then return it to the battlefield transformed.
"There's miles of land in front of us." -Tyler Joseph