To solve the issue of forgetting phone numbers after a few generations, the best way is obviously to simplify the phone numbers. Still, if it's too simple, everyone and their cat could dial in, leading to a communication breakdown.
Lucifer brainstormed a few solutions but none were satisfactory. They were either too troublesome or ineffective, so he had to gather all the archangels to discuss a better way to facilitate communication between Heaven and Earth.
Of course, among the archangels was Bruce Wayne, who had taken over Gabriel's position.
Although angels are perfect creatures by nature, perhaps their immense strength and pure environment contribute to their absolute innocence, a type of beauty untouched by knowledge.
Even more crucially, they aren't human and can't empathize with weaker races. They either overestimate or underestimate humanity. The solutions they proposed were either too hard for humans or too troublesome for angels. After a long discussion, they still couldn't find a viable solution.
However, at the end of the meeting, Bruce sought out Lucifer and volunteered to take on the responsibility of updating the communication method between Heaven and Earth.
Lucifer was overjoyed. Not that he was particularly passionate about the project, mainly because having Batman, a bat who grew into an angel, preoccupied with something significant was better than anything else.
Otherwise, Bruce would sit by the pool in the sanctuary every day, and Lucifer would worry about the next angel walking out with green hair.
After the meeting, Bruce greeted each archangel with a smile, and they all responded with smiles of their own. They've grown accustomed to Bruce's presence. It could even be said that he was more angelic than any of the angels here.
Though the Archangels are perfect creatures created by God, Batman, obviously a more superior existence, is the most perfect human. His perfection is set in the fundamental laws of the universe, even more unshakeable than the angels.
Batman's lack of interpersonal communication and emotional understanding could have been seen as a deficiency, but since Bruce's stellar graduation from Shiller, he had come to terms with it.
When Batman finally stopped battling Gotham, he had many things he could do - dating Selina, researching plants suitable for Gotham with Pamela, developing agriculture in Kent Manor and Mexico, improving the weather controller with Lex Luther, establishing Earth's magical defense network with Green Lantern, Hal, and Supreme Magician Strange, constructing space stations with Diana, moving freely between Heaven, Hell, and the inner world, he became a familiar face among all the angels and demons.
Bruce's actions in Heaven were entirely based on the behavior of a perfect angel, beautiful, wise, pure, yet majestic. Hence, Michael immensely loved him.
Since Lucifer got to know Bruce Wayne, or should we say, watched him grow up due to Shiller's influence, Lucifer was clear about how innovative this special Batman was. Hence, recently, Lucifer was often worried about his brother's life and property.
After hearing that Bruce was undertaking the responsibility of updating the communication method, Michael expressed his full support and gave Bruce access to almost all the powers required to alter such rules.
Of course, Bruce wasn't all mouth. He did have a way to update a communication method that was simple yet had a certain barrier - math.
If you asked who could recite Pi to the 100th decimal point, there wouldn't be many people. But if you asked who could calculate to the 100th decimal point, the number would be hundreds of times larger.
To begin with, memorizing Pi to the 100th decimal point is meaningless. They're just numbers. But the ability to calculate decimals signifies a complete discipline.
Compared to a complicated string of numbers that are useless in daily life, a discipline that's practical for everyday use and allows for in-depth research and truth-seeking is far more likely to be passed down by the pragmatic human race.
Bruce planned to establish such a discipline.
After having in-depth discussions with Strange, Bruce realized there was more to the differences between magic in the two worlds than the Earth's magical defense network.
Compared to it, the Marvel World had a more complete legacy of magic. Due to the past energy shortages, they developed many disciplines that maximize energy utilization under energy-deprived conditions, such as teleportation magic, which was immensely useful for mankind's interstellar journey.
It wasn't until he interacted with Strange that Bruce realized teleportation portals weren't just about moving objects or people by connecting two spatial nodes with magical power.
How to teleport the farthest with the least amount of power, how to intelligently identify objects going through the portal to adjust energy consumption, how to open portals under various types of interference, and how to lower the barriers to using portals— that's what teleportation magic truly was about.
Similar studies included magical defense network studies, magical item infusion studies and the emerging study of magic wand creation; all these branches of magic in the Marvel World invariably involved the study of how to conserve and make the most out of energy.
Even with a cursory understanding, Bruce could discern that the universe Strange was from must have experienced a harsh period of impoverishment, but it's not something to be ridiculed.
On the contrary, the DC World had suffered from abusing and overdrafting energy for too long. Hence, no one really delved deep into any discipline. Every inheritance left was ambiguous about certain issues, some even contradictory. Most emergency plans and solutions focused on ramping up energy input, without any form of rigorous scientific research spirit.
Seizing this opportunity, Bruce planned to thoroughly reform the knowledge inheritance system in the magic realm; at the very least, he wanted to establish a fundamental discipline like Rune Studies before moving onto other things.
However, when he started trying, he ran into a problem. John Constantine, the only sorcerer in this universe who could be considered a master at Rune Studies, couldn't use magic anymore.
So, Bruce had to seek another plan.
To solve this seemingly insoluble problem, limiting his scope to this universe wouldn't do. But meddling with other universes wasn't easy either. Bruce's plan was — fishing.