IceWings and maybe the SandWings might've been the first and once only tribes with animus powers.
Let me explain: Any NightWing animus would be related to Darkstalker, and then, therefore, the IceWings.
Prince Albatross was the earliest known animus in the SeaWing tribe, and it was confirmed he was partially IceWing.
As of SandWings, the only dragons we know that are animi are Jerboa and her daughter.
From what we know, MudWings, SkyWings, and RainWings (which have been confirmed by Tui) have never had an animus dragon before.
EDIT: Actually, Imveryindecisive pointed out that we know for sure that SkyWings have had animi before, but they were killed in fear they would lose their souls like Albatross.
