As someone who prefers to play Paladin, I would never carry that card in a deck. It's such a thin slice card, useful in narrow circumstances (opponent has no removal, draw it early). Even then it's a dead card half the game.
Why would I play Bolvar when I could play Spectral Knight? At turn 5 Bolvar might be, if I drew Bolvar in my opening hand, if I drew lots of early game minions to play on turns 2 3 and 4, and if all of them were destroyed by turn 5 (something no one wants to happen) a 5/7 or 6/7 minion. At that point it's silenceable, sheepable, assassinatable, hexable, and more.
Yet, by turn 5, I expect my opponent to have some removal. Or board control with several minions. Or both. Alternatively, Spectral Knight has 1 less health, maybe 1 or 2 less damage, but it's going to stay on the board. Nothing is going to remove it, short of an amped up AOE.
Maybe I draw Bolvar mid to late game and it becomes a 5 mana 2/7 or 3/7... or a 1/7. Complete garbage. The only scenario I can imagine it being useful mid to late game is some sort of minion producing card, like Haunted Creepers. Then you're playing trash just to get Bolvar pumped up. You might as well concede if you're doing that by mid-game.
It's not even worth thinking about. The card isn't on Rag level or Tirion level. It doesn't do enough right away. It doesn't have decent stats. It's not even Boulderfist Ogre or Stormwind Champion level. It's the proverbial Angry Chicken of legendaries: a joke that almost never works.
Throw it on the pile with Milhouse Manastorm, Nat Pagle, and Tinkmaster Overspark.
s, but most decks only run one these days (I do anyway, and I'm thinking of adding a SW
