The Voodoo Doll has been in The Sims 4 game from the beginning. In The Sims 3 however, this had to be purchased from The Sims 3 Store as I remember, as extra content for your game. When you "bind" the Voodoo Doll with a Sim, you can then affect the Sim through the doll. For example, if you pour water over the bound doll, the Sim that it is bound to will become soaked. Likewise, if you place the bound doll on a fire, the Sim that it is bound to will simultaneously be set alight. I found this out, thanks to a post by a fellow Simmer, on Reddit.
For your Sim to acquire a Voodoo Doll in The Sims 4, your Sim will either need to purchase one, which costs around 1,000 simoleons or may "win" one from the Humour and Hi-Jinks Festival if you have City Living installed. This is where Willow Mendip acquired hers.
Having had this doll in her inventory for quite a while, it was only a matter of time in which Willow would test this out.
There are many festivals in The Sims 4 and a few more have been added with the Snowy Escape expansion pack. One such festival that came with this pack was "The Festival of Lights". Lights of course come in the form of stars, lights, candles and fire, such as bonfires. One such bonfire is conveniently placed in the Festival Square for anyone to light and interact with. For an evil witch with a Voodoo Doll, this is a dream come true.
One elderly Sim was chosen for this experiment as it was deemed that she didn't have "long to go" anyway. Willow introduced herself in a friendly fashion and was then able to bind the doll to her victim; she then threw the doll into the bonfire. The effect was instantaneous.
Unfortunately for Willow but fortunately for the Sim, the combustion doesn't last long and the Sim survived but, it was fun to do - for an evil witch of course.
- Minicart