TOME OF INVENTORY
Page 41: Tri-Blade
A special weapon usable only by those who are capable of using telekinesis. Dual-wielding restricts one to two weapons, but Tri-Blades are special in that they can be controlled via telekinesis without the cost of any magic or special move points. Most people tend to fight by wielding two of the swords and moving the third one around using telekinesis.
Note that Telekinesis is only usable by Psychic-elemental fighters and people who has one biological Psychic-element parent as of now.