It seems unlikely to me that Gruul will get 1/1 for your opponents turn, just yours. If he got 1/1 for both then he would very quickly spin out of control. I mean your opponent would have to deal 2 damage just to stay even, if he can't take Gruul out that turn. You'd pretty much have a card on the table that could only be taken out by specialized cards like Big Game Hunter or Corruption if that were the case. (And it's allready looking like that even with 1/1 only at the end of your turn.)
It could be though that Gruul gains after every turn, though. We'll have to get final confirmation from the team/beta.
I'm pretty sure it's after each turn. Look at the wording on Questing Adventurer for example. He can just as easily go out of control and he's not even a Legendary.
I'm pretty sure it's after each turn. Look at the wording on Questing Adventurer for example. He can just as easily go out of control and he's not even a Legendary.