Traveling between worlds required two conditions.
The first was the destination's coordinates, and the second was a means of transportation capable of taking you there.
As for the latter, he currently had three possible technical approaches.
The first came from the Ultraman world.
In that world, he had worked with Ultraman Hikari to complete a partial analysis of Ultraman Noa's power.
They had also achieved travel across parallel worlds.
Unfortunately, with the technology he currently possessed, he still had a long way to go before he could reach the output level of the Ultraman world.
The second approach came from the Type-Moon world.
In that world, he had jointly developed [Spiritron Transfer] and [Imaginary Number Dive] with Chaldea and Animusphere.
However, those technologies were still only in the theoretical stage, and bringing them to completion would be no small undertaking.
So his only option was the third one—the thing that had brought him to this world in the first place: Decade's cards.
The principle behind them was very similar to a camera and film.
Simply put, they could record the scenery of a particular spacetime, along with the physical laws contained within that scenery.
And precisely because of that, through certain special means, the data stored within the cards could be materialized.
That was probably why Kamen Riders Decade and Diend could use the powers of other Riders. One applied those powers to himself, while the other summoned them forth.
The transformation devices of those two Riders had been manufactured based on Tsukasa Kadoya's own Aurora Curtain.
In other words, these cards contained the power of the Aurora Curtain—
Zhang Qi's fingers tapped against the metal surface of the console, producing a monotonous "tap, tap" sound.
According to the TV plot, Great Shocker should originally have used this power to