Others didn't know, but the angels and the captain of the Valkyrie immediately felt the difference between this rectangular crack and the previous long slit.
This one felt like it came from a higher-level Hell, indeed.
The angels' faces changed rapidly and they immediately contacted the elite Valkyries outside of their war chariot.
"Stop that tiger! That tiger is opening the second level of hell."
"A low-level angel like us who lived in the seventh layer of heaven can't fight whatever demons came out of that crack!"
Strictly speaking, the elite Valkyries were stronger than these angels in terms of fighting but the angels were stronger in terms of purification.
Since the angels said that Code-L was opening the crack to the second level of hell, it means only mid-level Valkyries and high-level Valkyries could withstand the blow.
But that's only for HellFire.
