Spirit Portals are used to save your game and restore health. There are 8 located throughout the world, and most are on the path as you go through the game, but some require a small bit of adventure to reach.
[0:00] Well #1 - Sunken Glades
[0:23] Well #2 - Hollow Grove
[0:36] Well #3 - Thornfelt Swamp
[1:03] Well #4 - Moon Grotto
[1:15] Well #5 - Ginso Tree - MISSABLE
[1:28] Well #6 - Forlorn Ruins - MISSABLE
[1:47] Well #7 - Valley of the Wind
[1:58] Well #8 - Sorrow Pass