The Blood Ring is a secret item in Phoenotopia and possibly Phoenotopia Awakening. It's a very useful item that instantly brings Gale's health up to 10 if it ever falls below that amount (unless Gale is hit by an especially powerful attack that brings her down to 0). It can be found in the Hidden Village, where it can be bought for 999 Rai. This makes it the most expensive item in the game.