Boohoo
A modification created specifically for the SpookyJam 2021 modpack adds a ghostly enemy to the game that appears during nighttime. The probability of its appearance can be configured in the settings files.
The ghost begins to pursue the player and attempts to kill them. After a successful attack, the ghost takes one item from the victim's inventory and flies around nearby for some time before completely disappearing.
The mod can be freely used in any modified Minecraft modpacks.