I don't remember if metal tools are even a thing or not. ((I haven't played in a long time, though.))
There's currently 1 method to ascension - the Mausoleum, which requires special researches based around religion, a long build time and a mass sacrifice before you're laid to rest in it, if I remember correctly. Again, though, I haven't played in a long time.
Metal tools are available with "smelting" technology (you unlock furnaces, to make metal ingots, and blacksmith workshop that make metal tools).
Ascending is available if you have built a mausoleum, that you can unlock only if you got the trait "belief in the afterlife". It may take some time to get this trait (random).
Comments
There's currently 1 method to ascension - the Mausoleum, which requires special researches based around religion, a long build time and a mass sacrifice before you're laid to rest in it, if I remember correctly. Again, though, I haven't played in a long time.
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Soundcloud
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Soundcloud
Ascending is available if you have built a mausoleum, that you can unlock only if you got the trait "belief in the afterlife". It may take some time to get this trait (random).