Walker could see a large pendant that the immortal king wore around the dark cloak. It glowed with an odd light which was more mysterious than what Walker had seen the immortal king wearing before. But he could vaguely sense spatial mana. Meaning that it might be something left behind from when the immortal chasing race still existed.
Judging from the way that the immortal king was shouting and slamming his fists on the ground, it was clear that he was not making a success even though he ahd made it to the death elemental plane.
He clearly had some minor control over death mana, but the more he tried to force a full undead to rise, he failed. He wasn't just trying to make an undead that was a servant, but an undead that was exactly like him. Mentality and all from when the body was alive.
Once the immortal king stopped, he took out what appeared to be a small item.
'Shriveled heart