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.
Erebor Battle Master
Ally. Cost: 3. 0 1 1 2
This card was errata'd
Erebor Battle Master gets +1 for each other Dwarf ally you control. (Limit +4 .)
The Long Dark #79. Tactics.
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... — Alonewolf87 1620