http://www.youtube.com/watch?v=1eypNL1HOKQ
let's look at around 4:05
clearly it does reset autoattacks
that's not the important part though
the important part is that volibear is a melee disruptor who is meant to stay alive while dealing heavy damage. W means that you should already be building him tanky with high AA damage. E is for AoE crowd control, not damage. i don't see why you would ever build him AP when he has scaling on two of his skills which both have crappy cooldowns. the majority of his damage comes from his W and from autoattack spam. the majority of his strength in fights comes from his natural tankiness and his disruption. most of his damage is PHYSICAL. his W gets stronger the later in the fight it becomes. with that in mind, it ONLY MAKES SENSE to build him as a tanky metagolem DPS with the standard Wriggles/Atmog's/FoN or BV or Triforce or Randuin's.
let's look at around 4:05
clearly it does reset autoattacks
that's not the important part though
the important part is that volibear is a melee disruptor who is meant to stay alive while dealing heavy damage. W means that you should already be building him tanky with high AA damage. E is for AoE crowd control, not damage. i don't see why you would ever build him AP when he has scaling on two of his skills which both have crappy cooldowns. the majority of his damage comes from his W and from autoattack spam. the majority of his strength in fights comes from his natural tankiness and his disruption. most of his damage is PHYSICAL. his W gets stronger the later in the fight it becomes. with that in mind, it ONLY MAKES SENSE to build him as a tanky metagolem DPS with the standard Wriggles/Atmog's/FoN or BV or Triforce or Randuin's.