When I cast either Army of the Dead or Apocalypse with the Foul Menagerie glyph active, the Magus of the Dead that is spawned by the Army of the Damned talent becomes one of the random mobs and does not look like the caster. It appears as any of the glyph’s normal transformations, so a random geist or skeleton will be casting spells. This is NOT the case for the Magus of the Dead that is spawned from the Azerite traits; that one spawns normally.
Since without the glyph, the magus spawns with its regular model, I suspect that this is unintended. Definitely not game-breaking, just something I thought I’d pass on.
EDIT: This also does not apply to Visions of Perfection as Visions of Perfection does not spawn a Magus of the Dead when it procs.
So, Magus of the Dead Azerite traits spawns one Magus of the Dead as the major essence and Army of the Damned talented. If it spawns one, with the talent, shouldn’t it spawn a second one?