what is I.A.I. technique?

Answer 1

With the Agatean IAI TECHNIQUE (lit. "To free the blade to cut open
the bellies of the unworthy dogs") you can draw a weapon from its
scabbard and attack your opponent in one movement. To use this
technique your hands must be free, and the long, bladed, weapon must
be in a scabbard. Iai is used to initiate combat, so you can't be
fighting while using this command. Your skill in
fighting.special.unarmed determines your ability to
prepare, which costs 60 fighting points, and your skill in
fighting.special.weapon determines your ability to
hit your opponent. Your skill in your chosen weapon determines the
efficacy of your attack.