Traditionally, creatures that serve spellcasters are referred to as familiars. Every term in the game doesn't have to make absolutely every person who plays it 100% comfortable. If you lean more to a conservative religious world view and feel uncomfortable with overt references to witchcraft, maybe you shouldn't have bought the pack. That would be like me buying "Laundry Day" and then griping about the piles of dirty laundry that appear because I put a washer in my house. Most people who get a pack with a magic theme are cool with concepts like familiars and spellcasting and such. If you're not comfortable with that stuff, then maybe it's one of those packs you skip, just like I skipped "Laundry Day"...because doing chores sucks.