Half-Moon Katar (3.5e Equipment)
From D&D Wiki
This weapon isn't my original idea. It is based off of the "Jamadhar" on Ragnarok Online.
The Half-Moon Katar was made in an effort to make "Punching Daggers" more effective in combat. A critical hit is known to cause the victim to bleed uncontrollably (Same as Bleeding Critical Feat listed at bottom of page). It can effectively slash or pierce. Is more commonly used as pairs, but it is acceptable to use only one. Weapon Finesse applies to this weapon because it is a light weapon. Because it is such an appropriate weapon to use with each hand, The penalty for dual wielding these is as if you had Two-Weapon Fighting.