I think mindrender lucia got originally made a few months after wild druid had a toggwaggle deck that literally stole your entire deck + hand + no swap backs + 4 mana psychomelon tutoring.
I can’t remember if it solved the “how do you counter yourself, having your entire hand stolen and copied and playable for 1 mana while leaving 7/7 + 5/5 + 10/10s + 4/4s + 7/7s” on the board problem.
As the entire nature of Toggswaggle druid allowed it to steal anything you played (and play it for often free while leaving you with a drawn out deck that hyper tutored the combo and left you with nothing to play).
It was a lot like Tony druid, 5 mana? 4/6: Swap decks while alive?
except somehow Tony druid was every problem with the deck made 2x worse if you couldn’t clear it. But flopped down like a wet towel if you could.
For illucia though, i think when it was during stormwind(?), spriest, given Archbischop benedict and aggro priest cards, instead of using illucia as a mind game swap of often full control cards, instead flooded out their hand. And used it as a 2 mana ‘lockout’ card that gave them their opponents cards. While giving their opponent a empty hand without any clears.
It kinda functioned like a 2-3 mana mini time warp. They still got to draw 1 card and attack with any (existing) minions. But the card was clearly designed around lackluster control priests, and was kinda toxic even if overshadowed by the quest decks.
I think spriest then died or flopped over if it took one board clear or a Quest shaman. But i think it might have had some good matchups against Stormwind Questlock / ‘D6 Warlock?’?
Don’t actually think the old hand stealing version should come back tbh. But you could probably do a stat buff fine on the card if they wanted. I still think it’s a card that’s alright being left ‘weaker’ though. Power climb/creep is a issue and illucia kinda had balance problems. And i think tony/toggwaggle are gone decks and even if it did. You’d still have gotten deck locked out anyways when both copys of Toggwaggles’s 5 mana deck swap were cast.
Priest already has a problem of bad commons, mandatory legends in highlander wild. While it’s fun to have iconic cards/legends. 30,000-60,000 dust cost decks getting nerfed is literally a 300-600$ dust cost (p2p) or like 3-6 year f2p 10k dust/yr (if miserly) investment crumbling down.
Realistically, hearthstone is fun with more viable cards yes. But it’s also kinda cost prohibitive for some hs decks to cost as much to make as a brand new 300$-600$ console/gaming pc.