Death was the pressure and the hammer that built him into what he was, guiding his powers and himself through even more death and despair. It was his everlasting and true companion in all of this.
It was a tragedy in motion, Kyrie knew the dance and pace of this dance. Wherever his friends are is just the start of this journey. Skoll had made it clear that it was the start of something big. Something big with him, and Yggdrasil told enough about the danger coming.
The power of Yraka, the valkyries, was not at its true level yet. Everything that was happening was the start, and it is why Kyrie has to steel his heart and proceed.
"So, you gotta face death enough times and pray for your powers to be strong. If they are weak, you need to do more than just face death in the eyes." A weak power needed more compensation. It required something more to become stronger.
