There are 4 that can spawn to the right of the Valley Zone line. I just killed this mob twice and both times the PH was a grazing braxi and nothing else
EZ fight. Has a stun and knockback. Apparently summmons any braxi in the grove if in proximity but we dragged him to pit where we were camped and had no adds. Dropped Embellished Wrist Wraps and the 2hder.
Edit, that first mob was a static braxi. I've also seen it wandering on the lest side of the path from valley, so it's PH might be any braxi on the left side. Never seen him on right side of that path, tho.