Mary had a Little Lamb

Mary had a little lamb,
Little lamb, little lamb,
Mary had a little lamb
Its fleece was white as snow.

Mary is a powerful snow sorceress who sealed away the Itsy Bitsy Spider inside Mount Downpour many years ago, which also resulted in her getting trapped inside. As a result, she was regarded as "missing" for many years, until she was found alive by Mimosa and co. Mary is well-aware that the Itsy Bitsy Spider is still alive somewhere deep inside the mountain, and knows that Mount Downpour will only be free from its endless rain when she (Itsy) has been slain.

Her ice magic powers have depleted during her years of dormancy, so while she can still fight, she cannot use her power to the fullest. She currently doesn't know if anyone back at snowsheep village know that she's alive and well.