Flail of Ages

The Flail of Ages was a powerful multi-headed flail each of whose heads does different kind of extra damage; it also has an enhancement bonus equal to the number of heads currently on it.

History
It was originally created by a group of Rakshasa for use in different sorts of battles. At the time of the events of Baldur's Gate II: Shadows of Amn, it was in the possession of Lord de'Arnise (the father of Nalia de'Arnise). He was in possession of the handle and the fire, ice, and acid heads, which he kept hidden separately in his castle.

Uses
In the game, if the player character embarked on the quest to free the de'Arnise castle from trolls, they would have the chance to assemble the flail at a magical forge likewise hidden in the castle, its acid and fire heads making it useful against trolls. The handle could then be combined with any number of heads in any combination. Each head added its own kind of damage and one point to the enhancement bonus, and once all were attached, the flail also gained a chance to slow opponents.

Upgraded Uses
In Baldur's Gate II: Throne of Bhaal, further two heads for the flail could be found, and attached by Cespenar, doing electrical and poison damage and increasing the enhancement bonus as before. With both attached, the flail gained the further ability to grant freedom of movement and slight magic resistance, and the extra damage from each head was doubled.