Guthix's Blessing is an ultimate Constitution ability received as a reward for completing The World Wakes and requires 85 Constitution to use. When used, a green butterfly is summoned which heals 8% of a players' maximum life points every 2 seconds for 10 seconds. The summoned butterfly can be easily killed by both player and non-player enemies, ending the healing effect prematurely. Monsters will occasionally target and kill the butterfly when you're fighting them, ending its healing effect early.
If the area where the ability was used is left, the healing effect will be cancelled.
This ability can prove useful to players preferring to use two-handed or dual wielded weapons, as it offers a way to heal large amounts of life points in a short amount of time without wearing a shield required for the Rejuvenate ability.