Living Action Potion

This does not work on Maexxna's Web Spray.

If you know these affects are on the way, try using Free Action Potions preemptively. It takes more skill, but the immunity timer is longer and the cost lower.

As of patch 4.0.6 the use of Living Action Potion and the materials used to make it were changed.

The duration was decreased from 5 seconds to 3 seconds and the cooldown was decreased from 2 mins to 1 min.
The materials required to make it were decreased, now it does not require Heart of the Wild and only requires 1 Mountain Silversage (instead of 2)
and the 2 Icecap required is unchanged.

After patch 4.0.6:
Use: Makes you immune to stun and movement impairing effects for the next 3 sec.
Also removes existing stun and movement impairing effects. (1 Min Cooldown)
Materials: [2x Icecap, 1x Mountain Silversage, 1x Crystal Vial]

Before patch 4.0.6:
Use: Makes you immune to Stun and Movement Impairing effects for the next 5 sec.
Also removes existing Stun and Movement Impairing effects. (Cooldown: 2 min)
Materials: [2x Icecap, 2x Mountain Silversage, 1x Heart of the Wild, 1x Crystal Vial]

Also note, drank one of these to test it out in patch 4.0.6 and it does share a 1 min cooldown with Free Action Potion.

I recently tested a few things about this potion that might be useful to know.

As of the current live patch, it does not share a cooldown with pvp trinkets. In addition, I tested the potion's ability to remove stuns, and was surprised to find that I was able to remove the Kidney Shot stun and the Hammer of Justice stun.