Ideas (stick with whichever you like more):

1 - imitate the copyrighted official warhammer logo (example 1), do an own impression of golden hammer, with a lookalike font, maybe include "HH" for "HobbyHammer"

2 - include any version of the warhammer chaos symbol, which isn't copyrighted (examples 2,3 and 4) 

3 - do own impression (re-hash) of somebodies unofficial Dungeons & Dragons logo (example 5)

P.S.
It would be great to use one of the above ideas for the main HobbyHammer logo. And another one for the website header banner (1200 x 400 pixels)

Mikhail Makoev

Great vision and execution! Great communication & support too