I wanna see those new tarantula models RedShirtGuy was talking about. Those models are 13+ years old.
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As for Nightborne, it's not like we just helped them. We (Alliance and/or Horde) literally saved Thalyssra's ass from withering in the wild or being caught by hostile Nightborne to be made an example of and collected the scraps of their meager rebellion, turning it into a full-fledged war that lead to Thalyssra's victory.
The Alliance and Horde practically saved Thalyssra and the Nightborne. It is backstabbing to join one faction after that.