This is also why Vegeta mentioned in the training room that he failed to transform into a Super Saiyan 4 when he turned into a Golden Great Ape; he knew his own power wasn't enough. Bulma, however, said he could do it now, and after training for a period of time, his strength had increased significantly.
He would be able to transform successfully. Although this form relies on Super Blutz Waves emitted by a machine, it still proves that to transform into a Super Saiyan 4, one's own power must reach a certain height.
The Son Goku of the GT Era is at least ten times stronger than the current Son Goku; after all, the Son Goku of that era is ten years older than the one of this era.
For a Son Goku with ten extra years of training, even without encountering any life-or-death battles, a twofold increase in combat power per year is actually a conservative estimate.
Lei Chen estimated that even if the Son Goku of that time could only transform into a Super Saiyan 3, his power would be at least ten times greater than the current Son Goku.
That is to say, a combat power of at least ten trillion.
However, Lei Chen now has an idea: by borrowing the energy of a Super Saiyan God and combining it with Super Blutz Waves, he should be able to transform into a Super Saiyan 4.
And unlike the Vegeta in the original story who lacked a tail and couldn't transform into a Super Saiyan 4 at will, he currently possesses one.
Thinking of this, Lei Chen suddenly stood up. His black hair flashed and turned gold—the Super Saiyan state emerged!
Immediately after, a layer of lightning crackled and danced around him like golden snakes, signaling his transformation into a Super Saiyan 2.
The light radiating from Lei Chen grew increasingly intense and blinding. Layers of electric sparks surged from the soles of his feet upward, and his hair began to grow longer.
Lei Ge did not roar loudly like Son Goku to transform into a Super Saiyan 3; instead, Lei Chen calmly raised his energy.
However, the veins bulging on his neck and his trembling cheeks showed that the transformation was not easy. Lei Chen's long hair began to thicken, growing bangs in the front, with several strands extending from behind to drape over his shoulders, while another portion flowed down his back.
Super Saiyan 3.
Suddenly, a flash of golden light swept past, and Lei Chen successfully transformed into a Super Saiyan 3. His Super Saiyan 2 combat power of 300 billion had surged to 1.2 trillion, putting his strength on par with the Son Goku of this era.
"Such powerful energy. Lei Chen can actually transform into a Super Saiyan 3?"
Son Goku can also transform into a Super Saiyan 3, so he naturally understands the power of this state. Vegeta, in fact, has also reached the power level required for Super Saiyan 3, but because he pursues raw strength rather than focusing on the state of mind, he naturally cannot achieve the transformation.
Son Goku was only able to successfully transform into a Super Saiyan 3 after following so many gods and receiving guidance from various King Kais.
Lei Chen, on the other hand, frequently meditates to gain insights into the ways of heaven and earth, so naturally, once his power was sufficient, he was able to transform into a Super Saiyan 3.
"Damn it!"
In the training room, Vegeta felt Lei Chen's power suddenly skyrocket and began training even more frantically.
"If I transform into a Super Saiyan God now, my power should be around 22 trillion."
Lei Chen muttered to himself. The power of a Super Saiyan God is twenty times stronger than a Super Saiyan 3. If he borrows the energy of a Super Saiyan God, perhaps he really could successfully transform into a Super Saiyan 4.