There are multiple artists with this name:

1. Wiccans are a psychedelic influenced Hardcore Punk band initially from Denton, Texas. Often described as what would happen when SS Decontrol and Blue Oyster Cult merged. They have two full lengths out on Katorga Works and a 7" out on Pass Judgement. Not a band to miss live.

2. Wiccans are an occult stoner/doom band from Detroit, Michigan. They sometimes bill themselves as 'Wiccans' when performing as an acoustic duo and 'Electric Wiccans' when performing with a full 5 member band, however their recorded works are always under the name 'Wiccans'.
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Artist biography from last.fm