Josen figured the three Fantasy Cards had probably come from Son Goku and the other two, one from each.
What Son Goku had dropped was the most common ability in the Dragon Ball World: "ki."
Judging by rarity alone, it was merely a blue R Card, but like "chakra" in Naruto, it was one of the foundations of the world's power system.
Josen had once used "chakra" to simulate Dragon Ball's "ki," but despite their similar properties, they were not the same thing.
Now that he had the genuine article, he naturally accepted it on the spot.
After all, what proper Z Fighter couldn't fire energy blasts?
The card shattered, and the ability manifested!
Pure physical energy, similar to Josen's exclusive Chakra by the Ton yet slightly different, sprang into existence within his cells.
A powerful tremor spread from the building housing the restaurant throughout West City, and an astonishing aura flashed into existence before vanishing!
Some cat-people and dog-people with keener senses had just noticed something unusual beneath their feet when the tremors suddenly disappeared.
Quite a few animal-people decided this was a warning sign of an impending earthquake and hurried to drive out of West City, causing minor traffic chaos.
Inside the restaurant, Josen's breathing was steady, with no sign that this man had nearly caused an earthquake with a single breath.
With the innate gifts of a Saiyan's constitution, countless streams of newly born "ki" accumulated simultaneously in his 130 trillion cells, easily exceeding planet-destroying levels of energy.
Fortunately, before it could truly erupt, the energy star core within Josen forcefully took control. Like rivers flowing into the sea, that immense physical energy poured into it, becoming part of his mana reserves.
Sometimes, low rarity did not mean useless.
It might simply mean something was more common