I dont understand why every recommended rune page says i should play dematerialize on a fucking Nautilus or Rell. I mean they both have minion execute already and it's not like they cant walk up to hit minions. Is there any reason to take this rune instead of biscuits?
Main reason is for tempo so you can roam or recall. You can Demat to hit level breakpoints for fast allins, to get targons from range in hard matchups or to hit surprise hooks.