Ok, so I've been thinking on this. And I do actually think there is an issue. My original post was in error thinking that the taunt was a power ability, and I wondered why it was allowed every turn to use it.
Now that I realize is his future basic, thanks to you making me go look, I'm still confused on why he gets to use it every turn.
I use my Carrie Rider Eddie. His future basic is Spell Vamp. On autoplay, I have never once seen the computer pick this ability to use, even though, say on Underworld Madness, it would be beneficial against the trolls.
Why then, does autoplay pick the future basic of the Mummy on almost every turn in the arena?