This concept of a bell makes me curious as well as Egu? Is he a local deity in your culture? I did a search on him but found very little information as there seem to be some differences between New World Vodoo LOA nd its root culture of Vodoo practices in West Africa.
I ask because here in the Philippines, our ancient animist and Shamanism traditions were erased for the most part when we were colonized by Spain with all thats left being localized folklore. I do see some parallels between current day Vodoo with what little I have pieced together from my research.
Now all we got left here is a hodgepodge of oral traditions, mixed with catholic practices. (Most black books here contain orations/prayers in latin but also hints of blood and animal sacrifice whic I find so uncomfortable to work with). I mean who prays to God to curse someone?? So I am tryig to return to my peoples roots.
Reclaiming our original covenants is precisely what led me to Vodou, so I understand your struggle and offer my condolences for your loss and the sacrifices you must make to achieve success in your endeavor.
Vodou is not monolithic it's megalithic. What popular culture knows of Vodou is a fraction of what exists and no where near what is greatest or most widely esteemed among those who practice. The cults themselves are mind staggering in scope and diversity and that is just the traditions. When you consider the societies, crafts, and solos it becomes incredibly diverse. And mind you, Vodou is only the West African traditions of the Gbe speaking peoples. The others have totally different traditions that are only indistinguishable to people outside of any of the African Traditions.
Egu is more familiar in the west under the Yoruba name Ogun, but in the east you may recognize Him as the problematic Hanuman. All indigenous practices are essentially Vodou. That's not to say they all come from Vodou, but that they all come from the same place Vodou comes from but only the Jews and the Hindus bothered to write it down and they only did so after thousands of years of keeping it pure, unadulterated and sacred.
You being uncomfortable with animal sacrifice is a result of the excessive artifice of modernity. Killing for purpose is a basic, natural, function of animate life but we have been educated to revile our own self sustainment. Ask yourself why it should bother you to pray over an animal, to offer thanks for its life and meat and ask the spirits to accept its blood as sacrament between you and them, but you are considered godless if you dare eat a meal without saying grace over countless animals whose lives were lost to sustain yours and to whom you give no consideration? Sacrifice in religious and magical practice is an affirmation of your need and the spirit's need. The blood does more than tie you a result, it cements good will and equity in support. I will speak more on sacrifice and offerings later.
As for who prays to God to curse someone, have you ever heard the expression "Goddamn"? English speakers pretty much curse things in God's name everyday.