A Wraith can substitute all of its Attacks in close combat for a single Chill Grasp Attack. The Wraith makes a single Attack; if this Attack hits, then it will automatically wound with the Ignores Armour Saves special rule.
Source: Warhammer Armies Project: Unofficial 9th Edition (v2.2)
A Wraith can substitute all of its Attacks in close combat for a single Chill Grasp Attack. The Wraith makes a single Attack; if this Attack hits, then it will automatically wound with the Ignores Armour Saves special rule.