The_Hanged_Man1
If I remember correctly, Herrscher of the End has absolute control over the Honkai energy, but I don't think Kuro is now able to absorb the ability of this Herrscher, the body is simply not ready, because he was almost torn from the Core of the second Herrscher, then he will definitely die from this, so he will probably remove it in the inventory (if there is one at all) and will simply develop to be ready to accept this power, I can't even count it for a piano, because in the previous era, as I understood, Kuro defeated Herrscher of the End at the cost of his life, and this is his well-deserved trophy.