We've tried nothing and we're all out of ideas!
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Is Moradin's hammer an artifact, could that be used for magical shenanigans inside the anti-magic field?
It is an artifact, the "Forgeringer".
Some artifacts might be powerful enough to have function inside anti-magic fields... although the Forgeringer has never displayed that kind of power. More problematic though, it'd be kind of difficult to use a hammer in the middle of a poker match undetected.
I remembered there being an exception for artifacts in the antimagic field description, but it turns out it's confusingly worded.
This section excludes artifacts:
But this one doesn't:
I don't know what you mean. Winning poker via the use of a hammer is a long honored dwarves tradition.