Earthen Might | D4 Druid Key Passive

Earthen Might is a Druid Key Passive with the following effect (simplified):
Lucky Hit: Damaging enemies with Earth Skills has up to a 5% chance to: Restore all of your Spirit and cause your attacks to be guaranteed Critical Strikes for 5s. This chance is increased by 10% for Critical Strikes, 10% against Stunned, Immobilized, or Knocked Back enemies.

Once you select Earthen Might as your Key Passive, you can't select any other Druid Key Passive. They're considered to be very important parts of your build, so it merits quite a bit of possible discussion.

How best to use Earthen Might

Basically this segment will be giving you a rundown on the basics on the "WHEN, HOW, and WHY" of the Earthen Might Key Passive.

Questions we would answer here would be like:
How to use Earthen Might, as a baseline.
Why you would choose Earthen Might over other Key Passives.
When would you consider Earthen Might? As a build-around? An "augmentation"?

Earthen Might Core Synergies

TBA: When choosing Earthen Might, are there "absolute godtier" level synergies you essentially NEED to take?

Related Links & Other Information

Still got a lot to do, a lot of data to track, and how best to present it! Post-launch will clarify alot of this for us!

In the meantime, Related Links:

• If you're here, you're probably looking for some info on the Druid Class.
• Related Skill Tree Nodes: Earthen Might
• Summary of all D4 Build and Character Customization Systems.