ID:139321
 
if("Supreme")
if(GMLockCheck())
usr<<"Your Admin Powers Are Locked."
return
world << "The Supreme\font dragonballs have been destroyed by [usr]!"
for(var/obj/Supreme_Dragonballs/O in world)
del O
Problem description:
saying O is undefined

You have not defined the type /obj/Supreme_Dragonballs.
In response to Garthor
ok it works now thank you