Some creatures are particularly more heroic than others, giving an attack boost to your creatures when you target them
but as far as we know, Final Fantasy Collector Boosters will never be reprinted
Given the prices for the average rare and mythic, foil and special frame variant, plus the serialized prices, companies will open boxes if they can get an amount of money for the singles that accounts for the cost, both from the distributor and the company itself (time paid to employees to sort, store, and ship)
A new bundle comes with between 8-10 Set/Play boosters, usually around 40 basic lands, one promo card, and more goodies
An example can be found in Firion, Wild Rose Warrior, which gives haste to all equipped creatures a player controls, and then also allows its owner to create tokens that are copies of equipment cards