Easter Egg Drop

Appearance
The appearance varies depending on who defeated the boss the dop is a customization based on the player's skills and fighting style as a reward. So the drop is unique to the player.

Background
The Easter Egg Drop is an item only acquired by defeating the Easter Event boss within SAO's first year. Each easter egg drop is unique and one of a kind. Within it is an Extra Skill that if opened the skill will be added to the player's list of skills. The Egg Drop itself is not soul bound as long as it hasn't been opened. This means it can be passed on to another player if it hasn't been used. Once used the skill inside is soul-bound to the player.