I can't give you specifics on numbers etc, but the ivory noble is not deceptively powerfull. It's rather insanely overpowered. We using this in a multiplayer campaighn and the ivory noble, both encountered as a barbarian or under the control of players is basically unkillable, taking maybe 3-4 hp as damage while dealing out 50-80.

I came to say this too. Ivory Noble, especially being a racial t5 unit, is absolutely busted.

Additionally, to make him both Mythic *and* shield makes him really busted since he benefits from things other t5 mythics or even t4 mythics don't.