Here is a place where you can look to see where your rank gets levelled up based on your XP in the guild. ..
Elite Terror and Keepers of Nightmares 20M
Eternal Tormentors 10M
Black Knight of Iza 7M
Plagued Knight of Iza 5M
Deathguard Commander 4M
Disturbingly Cheery Reaper 3M
Destroyer of Hope 2.5M
Skeletoneer Deathguard Elite 2M
Skeletoneer Demoralizer 1.5M
Skeletoneer Fearbearer 1M
Captain of the UnderGuard 750K
Skeletoneer UnderGuard 500K
Skeletal Death Knight 200K
Undead Henchman 100K
Boneswain 50K
Motivated Gravedigger 25K
Gravedigger 0
Special Ranks are as follows:
Travelling the Unpaved Road to Oblibvion - Inactive for 7+ days or failing to abide by guild rules.
Back to Life - Vacation/Leave of Absence
Pickles Nunu - Pickles666 recruits
Ygg Slave Monkey - Yggs recruits
Chris' Undead - Chris' recruits
Followers of Darkness - Blan's recruits
**Subject to change