Talk:Shinjuku Summoning Campaign/@comment-80.106.98.169-20170222233425/@comment-28349180-20170223044836

i dont know the chances of a silver turning gold, most call this the lightning effect since lightning strikes the card to trasform it.

gold balls means that it can be a gold servant no matter what (4 or 5 star, with 4 being more likely)

rainbow balls means a 5 star servant.

cases of normal blue/silver balls can still produce gold servants though.