Don't forget burrow! Probably should replace steal with burrows
I'm not going to include burrow for the following reasons:
Graboids enter burrowed and cannot be unburrowed, so they are not targetable with this spell.
Shriekers are powerful enough without an extra skill. Giving them Mitosis or Deja Vu or basically anything would be ridiculous.
Devourers would be better off with Darkness generation than any other skill, really, except Immortality, which is a weapon skill, so it is already paired with Vampire (another weapon skill that creatures have).
IDGAF about Antilons.