Erebor Battle Master was completely overpowered in a Dwarf deck before his errata (spoiler alert: he still is). You could plop him down and he'd swing for a minimum of four for the rest of the game. As is, he takes a couple of rounds for him to get pumped up, but once you get your dwarf swarm going, the Battle Master rivals a Booming Ent trio. Just let him sit there, making Dain's boost look insignificant, staring down (up? he is a dwarf) orcs with that one eye of his.
And now another nerf hit our old friend limiting is bonus to attack to +4 (for a total of 5 Attack), a long life of battles is really starting to take a toll on him...
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Alonewolf87
2373