All in all you need good removal\control for Houndmaster.
That being said - if you think Gnomenapper is a hack you haven't played vs Glinda Crowskin yet. I had decent control\removal cards and passive for hounds (+2 attack) and yet this was not even near enough.
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Had no problem clearing him with Houndmaster Shaw with Lunar Signet and Companionship + Exploding Bloatbat.
All in all you need good removal\control for Houndmaster.
That being said - if you think Gnomenapper is a hack you haven't played vs Glinda Crowskin yet. I had decent control\removal cards and passive for hounds (+2 attack) and yet this was not even near enough.