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If an ability triggers "whenever you tap" something for mana and produces mana, that triggered mana ability won't be affected by Nyxbloom Ancient

A Word on Replacement Effects Doubling Season | Illustration by Richard Wright There are two stopgaps that might make someone think this combo doesn't actually work as described, so let's just touch on the relevant replacement effects here and how they actually work

Then, the swift and spectacular black chocobo, printed only in Japanese in all languages of Collector Boosters

Though for me theres nothing more iconic than Final Fantasys splashy Summons powerful spells which bring forth a monstrous ally to fight alongside you until they perform some big finisher