Enhancement Diversification, usually abbreviated ED, is a system of modifying the effects of enhancements when the total enhancement is above a certain percentage. Enhancement Diversification became effective on the production servers as of the release of Issue 6 and City of Villains. Enhancement Diversification is based on a system of diminishing returns on enhancements slotted to raise bonuses to a very high level. It primarily affects Single-Origin, Hamidon, and Crafted enhancements, though it is possible that enough slotted Dual-Origin Enhancements may be affected as well.