The ambusher is fielded by Zeratul in Co-op Missions. Every time it blinks, it leaves behind a Void apparition that attacks the nearest enemy for bonus damage. It can also be set to automatically blink back when it takes damage. At level 11 with all three artifacts collected, it can store three charges of blink.
The Xel'Naga Ambusher's Predictive Blink now leaves behind a Void Apparition that attacks once for 50% of its weapon damage.
The Void Apparition beam upgrade less than the Ambusher weapon. Thus, the percentage progressively decrease from 50%.
Damage Upgrade: +1 (+0.35 vs Armored) per artifact fragment Basic: 13 (+5 vs Armored) Level 1: 14 (+5.35 vs Armored) Level 2: 15 (+5.7 vs Armored) Level 3: 16 (+6.05 vs Armored) (unavailable with Herald of the Void) Level 4-103: 16 (+6.05 vs Armored) +1 (+0.35 vs Armored) per artifact fragment. Up to a maximum 117 (+41.5 vs Armored) (with Knowledge Seeker)