Experience Chain
From Drunkapedia
Related topics: XP Passup
Experience Chains, or XP Chains for short, used to be common in many allegiances. Instead of an "Experience Tree" as was originally intended, the Allegiance vassals would pledge to one patron, who would pledge to another, and on up the "chain" in the manner that there was one vassal to a patron who was one vassal to their patron.
It was a method for many allegiance members to gain experience points far faster than originally intended, and eventually, a patch was made to nerf XP chains by limiting how many vassals and sub-vassals a patron could get experience points from.