Option 1: The hero gets the buff. Here, the hero can build one hero tower that he then occupies (ranged heroes stand in their tower, while melee heroes have a rally point radius to keep them near their tower). That hero then gets a buff like greater attack range, higher attack damage, or activate skills more frequently. If the tower is sold, then the hero goes back to the road and uses their normal skills. Alternatively, the hero can be given unique skills that can only be used if they are in/near their tower. Warbot has some interesting ideas for how this can work in his Path of a hero thread.
Option 2: The tower gets the buff. Here, rather than focusing on the hero, it is the tower that is given skills that can be upgraded like other advanced towers. So the hero is attacking using the tower, and not necessarily their own skills. A good example of this would be say, Bolin riding in a Battle Mecha. Again, if the tower is sold, the hero goes back to using their normal skills on the road.
Option 3: Hero and tower hybrid: Here, both hero and tower use their unique skills in a synergistic way. So Alleria might use her normal attack skills, while her tree tower traps nearby enemies. Or combos can be used, so when Alleria's tower traps an enemy, she uses a special attack that deals higher damage on that foe.
And since these are hero towers, I would like to suggest that they have some distinguishing attributes that make them stand out from other advanced towers. Here are some ideas:
• When a hero tower is first built, it already starts as a level 4 advanced tower.
• Hero towers can have a persistent effect instead of at intervals. So Alleria's tree tower continuously sprouts roots to trap nearby enemies. The ground near Elora's ice tower is always frozen to slow nearby enemies. And Alric's sand tower cause dust clouds that blind nearby enemies.
How would you like to see hero towers used in-game?
i support this 
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Awesome stone golem made by FastAndBlast. (Thank you! 
