Earth Domain

• Level 2: You gain +2 Acid Spell Power (Corrosion) per Cleric Level.
• Your acid spells will use Light Spell Power if it is higher. Your light spells will use Acid Spell Power if it is higher.*
• Your Turn Undead works on Elementals.^†
• Upon Turning: When you use Turn Undead your party gains a bonus to Fortitude saving throws equal to half you Cleric level, and points of Acid Resistance equal to twice your Cleric level for 20 seconds.
• Level 5: You gain Melf's Acid Arrow as an SLA. 4 SP, 4 second cooldown.
• Level 9: You gain Stoneskin as an SLA. 6 SP, 4 second cooldown.
• Level 14: You gain Earthquake as an SLA. 25 SP, 30 second cooldown.

Notes:

* The shared spell power (higher of Light and Elemental) granted by elemental domains to "spells" does not seem to extend to non-spell effects, such as Arcane Archer damage or Warlock pact damage (DDO Forums). It also does not apply to spell critical chance.

† Mephits are outsiders, not elementals. Therefore, elemental domains don't grant the ability to turn mephits..