The Serpentine Helm is a very strong melee head slot item. It has three variations: Magma Helm, Tanzanite Helm, Serpentine Helm, the variation is merely cosmetic.
It can be obtained as a drop from Zulrah, or via the Wheel of Fortune.
Note, use ::debug to view IDs.
If you are to come across a Serpentine Helm with the ID of 37391: this item may not be equipped by a Mini, only ID 21142 may.
As touched on prior, the stats on the helmet are very good. Image and text copy below.
Attack bonuses Edit
Defence bonuses Edit
Other bonuses Edit