I use zalo chat which is a domestic application in Vietnam, because I don't know whose source you are using, so it's difficult to guide, but I recommend you if you develop, use @
Thúlio source. Muemu files will have more tutorials on the net, any error there you can refer to other muemu/ssemu sources to fix it. You can also copy the features of other muemu servers into it (/attack, /offattack, antiflood....). About the wings, you can easily adjust its damage and options.
You should also refer to @hugo source, there you will see the source of the effects for the wings
https://perfectzone.com.br/showthread.php?t=354
https://tuservermu.com.ve/index.php?topic=47010.0