The Door-Door Fruit was a Paramecia. Its power was not complicated—if anything, it was quite simple.
This fruit allowed its user to open doors at will. Whether they touched living beings or inanimate objects, they could leave all kinds of doors on them.
That included the air.
By opening a door in the air, the Door-Door Fruit could connect to a special world. Those inside the Door-Door Dimension and those outside it might be close at hand, yet people outside could not detect what was happening within.
It did not provide any direct increase in combat power, but in terms of overall strategic value, the Door-Door Fruit was immensely significant.
"They were probably planning to auction it off. In any case, it belongs to us now."
Nereus accepted the Devil Fruit Sebastian handed him and put it away.
Selling a Devil Fruit was also a choice many people made.
The negative effect of becoming unable to swim was only one reason. Sometimes, they also had to face the issue of unfairly dividing the spoils.
After all, only one person could obtain a Devil Fruit's power. Not everyone shared enough camaraderie with their companions to willingly watch someone else eat it.
Shootouts over a Devil Fruit were not uncommon. Selling it and splitting the money was instead the choice some Pirates made.
Others would swallow the fruit without a second thought the moment they saw it. No matter what power it granted, once it had been eaten, there was nothing anyone else could do.
This sort of situation was rarely seen among the Fish-Man Pirates.
Even veteran officers with greater strength did not mind letting newcomers use the fruit. After all, losing the ability to swim affected Fish-Men far more severely.
Nereus himself only had less reason to hesitate over eating