You can quite easily build a deck that profits off destroying your own enchantments just as easily as one that removes opposing enchantments
That means you can't free-roll them in just any deck
While this was by no means an instant Fusion Summon (such an effect would be even more powerful than the rightly-banned Cyber-Stein), this was a sure-fire way to bring out Fusion Monsters without having to rely on having the necessary Materials in your hand or on the Field, thinning your deck in the process
Note that when using such a password, the card's effects will most likely change from the actual TCG card, due to the way Dark Duel Stories plays (using the standard Duel Monsters ruleset)
If you choose Red-Eyes Wyvern and Red-Eyes Darkness Metal Dragon among the five Dragons, then you'll be able to bring REDMD back to the field during the End Phase
Think of putting a sticker on regular copy paper matte finish versus sticking it to a glossy sheet