On September 7th 2009, Capcom-Unity and Capcom-Europe held contests for giving their members a chance to design and name a weapon for Monster Hunter Tri. Winners of the contest in Europe were announced on November 19th 2009, and winners in North America were announced on December 2nd 2009. The Lion's Bane is one of the designs that won in Europe, the other being Tenebra, the chosen name for the Name a Weapon contest, and the other in North America being Sinister Saints.
The creator of Lion's Bane was a user named Jan-Wah Li.
The Lion's Bane was originally designed to be a Sword and Shield.