For them there was nothing. There was no sound to be heard. There was no object to feel. There was no sight to be seen. Just nothing.
They were just there. Alive but not truly alive. Not capable of any movement. Their skin was pale as snow with a purplish tinge. They remained corpses that could not rot. Their heart had stopped moving a long time ago. But they were alive. At least they hoped they were.
Then there was light. The first thing they had seen for tens of thousands of years. They could feel that the seals that had restrained them were losing their power. Until they were gone. With the seals destroyed, their memories were restored, causing them earth-shaking pain. Ignoring it, they look forward.
Emerging from the light, they could vaguely make out a person. That was the last thing they saw before they lost consciousness.