Shapeshift into the Tree of Life.  While in this form you increase healing received by $5420s1% of your total Spirit for all party members within 45 yards, your movement speed is reduced by $5420s2%, and you can only cast Swiftmend, Innervate, Nature's Swiftness, Rebirth, Barkskin, poison removing and healing over time spells, but the mana cost of these spells is reduced by $5420s3%.

The act of shapeshifting frees the caster of Polymorph and Movement Impairing effects.