Give AI shells a magtractor

[Vitatroll]

My only real desire here was to see a bee shaped shell honking at people.

That being said, I don't know what's so bad about them getting magtractors. A borg shell would still be better all around. The worst they could do with default magtractors is inefficiently hellsmoke/foam after a long setup. Maybe steal something important? It's not like I'm passionate about it, so eh.