Hero Item Combos

[iluvwarcraft]

When a Hero buys items from the shops, there are items which he can combine to make a better weapon, right?
Is there a list of the combos? I'm new at this game.

 

[InfectedWithDrew]

In the normal game there are no combos. That's done when people make their own maps, through triggers. It checks if the items are in the person's inventory, then destroys the items and puts a new one in.