The ad reduction on mocking shout is now a passive aura.

This way tryndamere has to choose between slowing you or reducing your ability to fight him, rather than getting both for free.

20 instead of 80 at max rank.

Critical strikes on enemy champions quadruples it to 80 for 3 seconds.

Now the attack damage reduction only applies to bonus attack damage, and cannot reduce below an opponents unmodified base attack damage.

Activating the slow removes the aura until it comes back off cooldown.