in strat undead, the invisible units “eye of naxxramas” are supposed to yell THE LIVING ARE HERE, when they spot a member of your party, a totem, a pet, or feel like murdering the party by aggroing through a wall, gate, or around a corner full of elites.
they are instead fel reaver’ing groups, with silent murder. i’m not hearing any audion, seeing any emotes or shouts (i have a panel with EVERYTHING turned on) and i’m not finding any patch notes where the behavior i expect was added or changed at a later date.