The Guthix bow is a shieldbow aligned with Guthix. It requires a Ranged level of 55 to wield. It can be obtained from Treasure Trails by completing an elite clue scroll, or as reward from the Giant Oyster. This bow doubles the chance of Guthix arrows dealing bonus damage (from 10% to 20%).
The Guthix bow has a special attack called Balanced Shot, which uses 55% adrenaline. It deals 150% weapon damage and heals the user the amount of damage dealt over time. When Guthix arrows are equipped, there's a chance to deal an extra 100% weapon damage (Earth spell damage), which also adds to the healing effect. The healing effect lasts for a minute and heals 10% of the damage dealt every 6 seconds.
The special attack is a combination of the special attacks of the Zamorak bow (dealing extra damage) and the Saradomin bow (healing over time). This explains why it is "balanced".
This bow also has a grip similar to a longbow which is midway between the Zamorak bow (which is a recurve bow and so has a very straight grip) and the Saradomin bow (which is very similar to a shortbow in appearance, with a curved grip), thus making it "balanced".