The Horn has to be the best ever reserve force.  In the battle if a breech occurs in the line of the forces of light Mat merely has give a toot on the horn and send the Heroes of Legend (HoL)to seal the breech.  If he sees a command spot on the side of the Dark Forces once again blow the Horn and order the HoL to take it out.  It could be a reserve force carried on a strap hung around his neck, always ready and at hand.

Nnnnn-not sure but I think you can only use it once in a battle, they would fight to the end.

He'll fall face first on to it and blow it by accident.

He will lead his army on to the field of battle playing Puff the Magic Dragon and the HoL will kill all the bad guys ;)

Remember how it happened on Falme ?

How it was tied to the battle betwin Rand and Isha ?

There are not sow many thing we know about the horn .

He will lead his army on to the field of battle playing Puff the Magic Dragon and the HoL will kill all the bad guys ;)

 

LOL

I think when Mat (or whoever) blows the horn, Arthur Hawkwing will show up, and be all alone.

he'll say everyone else had been spun out already, and Ellayne will go into labor.

Then he'll say "Well, almost everyone, forgot about those two."

 

He'll then look at Mat's army and arrangement, and say "Good Job. I couldn't have done better myself"

He'll go to find Rand to get his sword back, and that will be that.