I am trying to win this fight with control priest, but all the Wild cards (including classic) can't be used in this battle. So I can't use cards like Mind Control, or Shadow Word: Pain. Also all the decks from the internet don't work because it's all Wild now. How to win this battle?
Did it with this, sorry didnt see the comment about the deck list. Lady Vash'j draws alot, but if you just dont play anything you can slow it down alot. Just remove effectively, important to know is that she has those overload giants, see some hard removal for that.
Replace Yogg, illucia, C'thun, Xyrella, Soul mirror, Samuro, 1 insight and 1 apotheosis with Devouring plague x2, shadow word ruin 2x, holy nova x 2, wave of apathy 1x, deathwing 1x The deck is not made for the challenge, so most legendaries didnt really have that much use in the first place. Alot extra removal in the deck. She will run out of cardes pretty soon I think. Use your removal effectively. Deathwing is a last resort, it's nice that it doesnt remove your whole hand. It might sometimes be better to let 3-4 damage come through so you can use removal the next turn when she will overextend.
No garantee this will work, but I think it would work better than the initial deck as alot of these legendaries are suboptimal.