Help: Sinful Vigor Usage sling 'sinful vigor' <target> Available Heretic level 18: Sinful Vigor. Sinful Vigor restores move with a dark Heretic surge. It is Heretic stamina recovery, not a hit-point heal. Current Effect The spell restores move using the healing-scaling system, with an extra flat boost added before the move is returned. See Also: invigorate, aura of sinful vigor, heretic