From an RPG.net thread on playing 5E in Middle Earth.
Your EA is, essentially, a 5th BIFT. It has a number attached to it as well, starting at 1. Every time you gain Inspiration from it, put a checkmark next to it. When you have a number of checkmarks equal to its current level, it advances. If it reaches 10 (i.e., if you get Inspiration from your EA 45 times), yerrrrrrr out. Elves go West (or die of grief), Dwarves turn into Dragons, Orcs go on a mad suicidal rampage.