By being whales, doing tons of summons, and then scrapping the blacks they didn't like :P
Jokes aside, non-whale way is simply to keep playing forever and sell duplicates of anything you won't use.
By being whales, doing tons of summons, and then scrapping the blacks they didn't like :P
Jokes aside, non-whale way is simply to keep playing forever and sell duplicates of anything you won't use.