This reminds me of the Halloween event where people could randomly transform into different creatures (Ahriman, bad, imps) and even GC leaders. I remember liking it and many thought that the items for the transformation would be perfect for GS vendors to sell ... maybe even limit it to the GS.

WOuld be nice to be able to transform while waiting for a GATE to pop-up
In fact, many things and mini games from different events would work for the GS such as the Haunted Mansion, the egg chase, egg escort (similar to Vase Off) etc.