“Upon death, the priest becomes the Spirit of Redemption for 10 sec. The Spirit of Redemption cannot move, attack, be attacked or targeted by any spells or effects. While in this form the priest can cast any healing spell free of cost. When the effect ends, the priest dies.”
This does not work for any of the healing runes (Prayer of Mending/Penance etc.) in Season of Discovery, is this intended and the tooltip is wrong or is this a bug.