- Regular Marks are normal monsters; mark bills renew daily, different depending on the adventurer
- Elite Marks are "appear under certain conditions" NMs of various difficulty ratings; mark bills renew weekly, identical for every adventurer
- Second Lieutenant rank in your Grand Company required
- Rewards: tomestones and Allied Seals
- Allied Seals can be traded for weapons, armor, minions, Oil of Time, Sands of Time, and Alexandrite
Edit:
Additional images from the FFXIV Facebook page.
"You know, I was God once."
"Yes, I saw. You were doing well until everyone died."