The only true exclusives in the Collector Boosters for Final Fantasy are special foil variants of some of those alternate cards, and multicolor variants of the Traveling Chocobo card with special neon ink, including a numbered serialized golden Chocobo, of which just 77 will be released
Not only is it a strong 5/6 flash threat, but it also offers great value since youre casting another spell for free, be it a counterspell, a removal spell, or just card draw
Its a cheap creature that doubles as artifact or enchantment hate, and its lifegain death trigger helps to pad your life total against aggro
Favorable Winds is a classic choice, and Heraldic Banner is one Ive been adding to nearly every mono-color deck I build
These don't specifically mention venturing, but they do amplify the effects of triggering your dungeons' room abilities
Discounts, special offers, Collector boosters, and of course getting extra turns