Q.Name of plant/bulb
My cousin gave me some bulbs to plant. She says they bloom a pretty hot pink/purple flower in the Spring and they eat up nearby bugs. When I saw it, the flower was gone but the remaining stalk was black. I planted the bulbs and they are growing now. The stalk is green and looks kind of spotted
darker green throughout it. It is quite tall in the 4 weeks since it was planted. About 3 ft tall. There are 10 leaves on each stem. The leaves are about 12 inches in length. What is this called? She jokingly called it a voodoo plant but clearly it isn’t. It’s a weird looking one though. I can’t find anything. All sources refer me to diseases of plants. Any ideas?

It does appear that you have a Voodoo Lily plant.
https://www.gardeningknowhow.com/houseplants/voodoo-lily/voodoo-lily-information.htm