Two-bladed sword

A two-bladed sword, or double-sword, was an exotic, two-handed melee weapon that could be used as a double weapon.

Description
The two-bladed sword was approximately the same length as a greatsword or a quarterstaff, but had two short sword-sized blades at each end.

Weaponology
It took special training to wield a two-bladed sword effectively, and therefore it was viewed as an exotic weapon. The two-bladed sword was a double weapon that could be used as if fighting with two separate weapons and was wielded two-handed if used so.

Notable two-bladed swords
A double-sword was wielded by the centaur hero Timoth Eyesbright around 1357 DR. Notably, this distinctive weapon was also extendable, the blades extending from the size of daggers to full-length swords when the weapon was whirled around.