I have to agree with griffstick on Strionic Resonator, played my Yasova deck last week at the WonderCon commander tournament and as soon as people see you start exploiting Yasova's power you have a bit target on your head. I am keeping it in my deck and thinking of adding some protection for yasova.

Asceticism for added protection?

I'd recommend something like Champion's Helm. It will protect Yasova, while also buffing her so that you can steal bigger things.

Both of those are not A bad idea im gonna place them into my maybe board until i can figure out what to cut

Joiner Adept, and Deathrender i might cut for those 2

Humble Defector is good with yasova.

Yea i can see how thats a nice and easy 4 card draw. But i will loose control of it by the end of turn. But if i can do things to keep it like blinking it, or Bazaar Trader, and Sundial of the Infinite, Conjurer's Closet, and many other such things. Good suggestion i like this, but he requires a combo piece. Worth testing out Though.

Hero's Blade fits well in Yasova because it's followed by her on curve

Hero's Blade is great if its in your opening hand. But the best benifit i see is that, about half of my creature are legendary. Thats a good enough reason, to at least try it out. But i think hexproof is more important like a Champion's Helm

Added Hamletback Goliath for creatures to copy other than legendarys i control and other clone like creatures. Took out Green Sun's Zenith cause its not strong enough in a 3 color deck.

Stomping Ground Breeding Pool Steam Vents

I hate to have to spend that kind of money on lands

Life's Legacy wouldn't be bad here.

You know i like that one but the one time use is kind of pointless in edh. Greater Good is good. Want to try Fecundity but im not sure how it inter acts with stolen creatures. They would die under my control but they hit there graveyard. So idk about that one.

You are the controller, they are the owner. It works quite well.

Solid deck. +1.

i was wondering. since Kiki-Jiki, Mirror Breaker is failry cheap now. or at least cheaper then before. what would you take out to make room for it?

Id probaly switch Phytotitan for kiki, but that adds another legendary creature to the deck. That sometimes can make it hard on copy spells when there nothing to target but your own stuff.

Interesting deck. Perhaps Quicksilver Gargantuan and/or Phantasmal Image?

Yes and yes the deck could use some minor tweeking like those two or Clever Impersonator. I really like Quicksilver Gargantuan

+1 because Tosh.