Hi everyone.
I love finding weird interactions between cards in Hearthstone. There's a lot of videos of it on Youtube. So I'll start this thread; I'll post a myth, the next person to reply confirms/debunks it, then posts his/her own myth, and the next person does the same.
Here I go, as an example:
Myth: Ysera's dream cards cost get reduced if you also have Thaurissan on the board.
No. I tested it and, regardless of which one got played first, first you get your cards in hand discounted thanks to Thaurissan, then Ysera adds a dream card to your hand.
(EDIT: I meant to say that the card doesn't get discounted the turn it's added to your hand. If you keep on it and still have it at the start of your next turn, Thaurissan will reduce its cost since it was already in your hand, while another, non-discounted Dream Cards goes to your hand. Thanks to Symphonic for pointing out. <3)
-Myth to confirm/debunk:
If you cast Conceal while controlling a Knife Juggler and then you play a minion, the Juggler loses stealth.
Enjoy!