It's nice to see a quest on here and hopefully it'll be okay with Bob to have it running.
In regards to abilities I think that the first priority would be to get the host out of the hostile environment, the second to see to her health, and a third being to try to prevent catatonia (as that would make for a very poor host). Hopefully the following would fulfil those criteria without being being beyond what could be offered:
[1] Matter displacing short range teleportation. (The host is important so any matter in the way can just go away. A long range isn't necessary.)
[2] Absorption of biomass to fuel healing. (It gets rid of the unwanted danger and helps the host's recovery.)
[3] Area of Effect "HELP ME!" mind control. ('Our' host is a social type of creature so the others of her type nearby can probably do something useful.)
(I'm not sure if the second power is viable though after the mention of powers being 'not general' though.)
In regards to abilities I think that the first priority would be to get the host out of the hostile environment, the second to see to her health, and a third being to try to prevent catatonia (as that would make for a very poor host). Hopefully the following would fulfil those criteria without being being beyond what could be offered:
[1] Matter displacing short range teleportation. (The host is important so any matter in the way can just go away. A long range isn't necessary.)
[2] Absorption of biomass to fuel healing. (It gets rid of the unwanted danger and helps the host's recovery.)
[3] Area of Effect "HELP ME!" mind control. ('Our' host is a social type of creature so the others of her type nearby can probably do something useful.)
(I'm not sure if the second power is viable though after the mention of powers being 'not general' though.)