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* Juggernaut can continue to attack buildings, siege creeps, and flying units as normal.
* Juggernaut can deny allied creeps and heroes as normal.
* By "attacking" enemies that are damaged by the Bladefury, Juggernaut deals no extra damage beyond the Bladefury damage, but any secondary effects of the attack still apply. This includes bashes and orb effects.(like maim, chain lightning)
* While in Bladefury, Juggernaut may continue to set off an enemy Axe's Counter Helix or an enemy Centaur Warchief's Return.
There is one exception: enemy ground magic immune units are neither damaged by Bladefury nor damaged by Juggernaut's attacks while in it.
Credit: Virot2