You invite the spirit of an ancestor to inhabit your body for a time. Choose one skill in which you are not trained. For the ritual's duration, you are considered trained in that skill. The greater the hero who calls the spirits, the more the spirits demand. The component cost of this ritual increases to 700 gp for an 11th-level caster, 3,600 gp for a 16th-level caster, 18,000 for a 21st-level caster, and 90,000 for a 26th-level caster.