This event has passed
They do stack exponentially, of course
It is very similar to Yunas ability, but its arguably more powerful as this is an enchantment so it cant be destroyed in combat, and its in play anytime a card goes anywhere, not just the graveyard
I've got plans already brewing to put together a Commander deck around Golbez, Crystal Collector, filling up my board with treasure and food token generation via cards like Nuka-Cola Vending Machine, Academy Manufactor, Currency Converter, and more
You can travel to iconic locations, confront powerful monsters, and even ride on the back of a chocobo
Of course, like any TCG, there are deck-building rulesso no, you cant just throw in every card you love