The Barons effect is neutral (it benefits both sides) so I’m going to discount it from the cost. You’re basically paying 6 faeria for a 4/5. Considering legendaries are supposed to be a bit op compared to other cards the Baron is just pathetic. Compare it for example to Seifer. He costs 1 less has 1 more attack and has an effect that not only is completely one sided but it’s also pretty, dare I say, overpowered. I get that the Baron is a neutral card so he doesn’t have the requirement of any land and doesn’t need to be placed anywhere specific but it seems to me the land requirements are extremely over valued in respect to the balancing of some cards.
An example of this over valuation is frogify and last nightmare. Both only require 3 respective lands but have some of the most OP effects in the game. Both of these cards for 5 or 6 faeria have the ability to completely remove any other minion. And honestly the 3 land requirement doesn’t seem to matter too much when your 15 faeria Tarum that requires 5 green land gets turned into a frog for 5 faeria with a requirement of 3 blue lands. The worst part being that it doesn’t even get to use it’s last words. The hilarious part being that the ‘turn it into a 2/2 frog’ thing is supposed to be a negative side effect so frogify costs 1 less than last nightmare even though it’s objectively better!
Frogify and Last Nightmare are both the root cause of the same balancing issue. They pretty much stomp on green decks and large minions because you constantly have to fear your big minion you just invested a large amount of faeria in is going to be instantly removed for significantly less faeria. I’m certainly not suggesting there shouldn’t be hard removal, in fact I think there should be more. I just think it should have a larger penalty or more situational usefulness. For example frogify could have a large land requirement like 5 blue lands so it’s more late game and you can’t as easily make a hybrid deck with frogify in it. For Last Night Mare it could scale but be easier to play so it costs 0 faeria 2 yellow land “destroy a minion. this card costs 1 faeria for each health the minion has.”
Those are just my thoughts after trying to make green decks work and being constantly stomped on by yellow rush decks that get in your face and then destroy any card you try to counter with and going up against green-blue hybrids that turn all my last word cards into bloody frogs.