The Impaler

This item uses Fireball stats with the following modifications:
The initial damage is (magical) piercing.
Creatures that fail the save also have their speed reduced to 0 and if they function using blood
(DM discretion) they take and additional 4d6
True damage. This item can only be used once
per long rest. Once attuned this item, you cannot
remove it from your attunement list until
unknown conditions are met
.