[quote=@whizzball1]
<Snipped quote by Legend>

And how did Accelerator get this "experience"? Without this, how did anyone figure out you could kill a compressed universe and by doing so expand your own Codex Essence?
[/quote]

Because it causes a comparable effect in reference to destroying actual Codex. You also cannot simply destroy a universe; it must be compressed into a pseudo-Codex.