Wording on these cards is a bit wonky, especially an artifact having an Opening Gambit and Dying Wish.
Ghost Tiger is a bit weak for 8 or even 7 mana, being a slightly weaker makantor, where in the late game it will just be removed by a spell the next turn or dies because it couldn’t kill a minion that could take 3 damage.
I’m not sure if the scorpion can fully heal itself if it is attacked by something, and dies, and then destroys its attacker with its counter-attack thereby evading death, but if it can, the card is still a bit weak for 8 mana considering dispel is a thing. Incredibly bad if its counter-attack can’t do that.
Monkey is useless, Shidai has better things to do at 8 and 7 mana.
All of these are really weak to dispel, and have low to zero board impact at such high mana costs.
Maybe reduce artifact cost to 5? Not sure as the spirit animals still don’t have a big impact besides ghost tiger.