According to the developers on-stage, they were designed to feel like the " ultimate prize ": according to the team, they look and feel like real gold
This then serves as a currency used to bring cards into play, however, there are plenty of other effects from cards that will allow you to add to your ink well, bring in characters and songs and perhaps, for you, more importantly banished the summoned creatures of your rivals
v1.0.22 Good app but improvements needed
Each creature that convoked this spell connives
Despite being placed on such a small card, the vista seems vast, and the golden tones really do make the whole scene seem regal in a way thats impossible to fully explain
They'll cast powerful spells, call upon classic summons, and even visit their favourite locations on the back of a Chocobo