Wisdom Scrolls contain texts in a philisophical manner, often about life or religion retrieved by Greenstone Games. Wisdom scrolls are found all over the world in Dig Deep. They are quite similar to real life fortune cookies which provide guidance in life or contain philosophical proverbs. There are 49 wisdom scrolls in total.
If you collect them all in a Dig Deep Game , you unlock the Sage Avatar Skin . They used to have no purpose apart from serving as a kind of easter egg or providing clues about previous adventurers.