The percentage life points healed is dependent on your distance from the crystal. Here, distance is defined as a square surrounding the crystal. For example, the square tile the crystal is on is a distance of 0; the square of 8 tiles adjacent to it are a distance of 1; the square of tiles adjacent and beyond each of those are a distance of 2, etc. Ice Asylum's healing takes place over 20 seconds as opposed to 10 and does not end even if the user is restored to full health, making it more useful in situations where the other healing abilities would bring a player to full health and end prematurely.