Second, while you do have a more narrow sacrificed permanent type, creature or artifact instead of anything, she gets a counter just like Juri but gets an extra bonus if the sacrifice permanent was a treasure token (Curse of Opulence anyone?)
Later, in the game, it easily can be an 8/8 or a 10/10, which is huge for Historic
As already mentioned above, only reason Elekinesis is a Watt is because of the Japanese name and what KoA decided to make it as on our end
Attacking with a one drop and dropping this on two will often be gameover
Also, I believe when people think of the Black Knight, they think of a knight that will not give up the fight no matter how much damage they've taken
As a fix, I suggested adding non-Demon before permanents