I'm assuming that it means that you have to have this in your hand for the bonus to take effect, right? But then at the same time Bolvar Fordragon text says specifically that his bonus takes effect only when he's in your hand.
Could it be that you can draw this late game and it will cost 0 from the beasts you played before?
It reads like this doesn't need to be in your hand. Surely a significant stipulation like that would be included in the text, no?
If it doesn't need to be in your hand, then that's going to be a big deal for beast druid. It looks like Blizzard really wants to push this archetype as they have several beasts and beast related cards in this set.
This was played as a 1 mana on the stream, so the transforming druid effect work. Kappa. Also, it have to be in hand to get discounted. (As seen that he got a second one that was undiscounted) Definitely very powerful, especially with Mountain Giant and Druid of the Fang. This could work in some kind of handdruid.
The problem with Beast Druid at the moment (and even with this expansion) is the reliance on the combo to have a win-condition. Straight up board trading isn't as effective in constructed, and whilst it's got lots of value minions, it doesn't feel like enough to beat out combo-wombo. Maybe in one more expansion though, and I really hope it happens.