only the first two are important
Strength of Stone
Reduce your damage taken by up to 20% based on the number of Calamity Blast charges you have stored.
Increase your Movement Speed by 10% for each Calamity Charge you have.
Reduce the Movement Speed penalty during Power Siphon by 15%.
Reduce the Cooldown of Shatterfall by 0.3s for every 1s spent channeling Power Siphon.
Heal for 300 for each enemy hit with Shatterfall.