You’re still attuned even if the magic items don’t work at the moment. Otherwise, you’d have to re-attune to all your magic items after entering any kind of anti-magic field/zone.

Soul of Artifice will function as normal.

Hey all

So I am running a lvl-20 oneshot with some friends soon and one of them is playing an Artificier. This has brought up the question that I can't really find any answers for:

Does an Antimagic Field effect Soul of Artifice in any way? I know Antimagic Field suppresses magical items but would it suspend attunement for this purpose or would they still get the +6 for all saves from that feature? 

Thanks for any help yall can give.

Soul of Artifice vs Antimagic Field