The fiend multiplier.
The fiend multiplier is a "fiendish invention" by Vendetta to multiply fiends when needed. The invention has three settings; "few", "some" and "many". Vendetta used "many" when she multiplied her guard dog fiend, which resulted in the fiend turned into six. Charlotte then used it to multiply herself, and she also multipled more Guard Dog Fiends. The fiend multiplier more looks like a clone machine or a duplicating machine