Using chakra like that, he probably didn't expect to make it back alive.
A human's chakra was limited. To increase the power of a Ninjutsu, one usually trained in nature transformation or pursued some other path.
The top experts at the level of a Kage had generally taken nature transformation to its limits, allowing them to unleash far greater power than other Ninja with the same amount of chakra.
Of course, if one had chakra on the level of a Tailed Beast, there was no need to train in nature transformation. One could simply pile on chakra, just like a Tailed Beast.
Clearly, Toroi's Magnet Release hadn't reached the limits of his Kekkei Genkai. The only way he could achieve such an effect was by burning through a massive amount of chakra.
By contrast, if a top Magnet Release expert like the Third Kazekage used this technique, he would handle it far more easily than Toroi and wouldn't need to burn through his chakra.
That was why Uchiha Fugaku had fled without hesitation. He knew Toroi couldn't keep fighting for long, so there was no need to struggle against a man who was already doomed.
All he had to do was wait for Toroi to run out of chakra.
Unfortunately, Ninja couldn't hope to match the speed of rapidly gliding iron. In an instant, under Toroi's control, countless Kunai and Shuriken surrounded Uchiha Fugaku and his group.
"Earth Release: Earth-Style Wall!"
"Earth Release: Earth Cover Drop!"
"Earth Release: Rock Pillar Prison!"
Fortunately, Konoha had plenty of Earth Release Ninja. In moments, they raised wall after wall of earth.
"Clang! Clang! Clang!"
Listening to the constant impacts against the earthen walls, Uchiha Fugaku looked grim.
He knew the Earth Release defenses wouldn't hold for long. The endless metal storm outside would