Except that energy did go somewhere - it got drained into the curse yayoi set up, and is now being further drained by otogiri. It’s possible he might not let himself be fully drained, and will still exist in some form after this fight, but if he does he’ll be so weak his influence will basically be nothing, and depending on who, exactly, is still worshipping him, he may not be able to recover any meaningful level of power without outside assistance. All of this assuming yayoi doesn’t just bottle him for later.