I was making that helmet with nightvision, but it does not seem to work
I was using the Divination Sigil on a block before I activated the crafting.

Did you include both a blood orb and blood shard?
I think you just need the blood shard, adding a blood orb just makes it cost less. Also, you can use a ritual of unbinding to take your existing helmet apart rather than making an entirely new one.
i wonder why is it believed that Divination Sigil grants night vision?
i also tried using Divinaton Sigil to get night vision in AgS, but it just didn't work, so i tried Sigil of the Blood lamp and got me night vision and spare divination sigil...
disregard that. it was just random act of stupidity.That's odd, because in my testing I could never get the Sigil of the Blood Lamp into the armor... How did you manage that...?