Help on spell true healing sphere

Current upkeeper: Xiao
Casting time    : 5
Spell cost      : 1
Spell type      : heal (party)
Spell words     : spherax absoluta
Affecting stats : Wisdom, level
Affecting skills: Anatomy, healing efficiency, healing mastery, faith of thanas
Affecting spells: True healing sphere
This spell creates a healing sphere that will heal most the party's
wounds.

Traveller's song < List > True null ray