The Auric Hammer

In the Combat Phase, at this models Initiative in the Initiative Steps, you can opt to make a single killing blow instead of attacking normally. When you opt to make a Killing Blow, select a single enemy model within 1" of Eidolon. The target model takes 1 automatic hit and wound from the Glory Aeterna. Saves may be taken as normal. The wound inflicted when making a Killing Blow is treated as an Instant Death Wound.