Dota IMBA/Axe

Summary of changes made

 * Berserker's Call grants Axe +200 armor, and makes enemies affected by it attack faster.


 * Battle Hunger has no base duration, lasting until purged, or removed by last hitting an unit. Prevents target from regenerating health naturally. Ends if the target comes near its own fountain.


 * Counter Helix deals less damage, but has dramatically increased proc chance.


 * Culling Blade's damage threshold increases based on Axe's own maximum health.