[quote=Slingshot]
Can't say I'd allow you to be an Immortal. Pretty OP for my taste.
[/quote]

In the book Hermes states that some can be killed by being shot, although they do have some rather nifty psychic powers, and can chase a tardis through the Time Vortex. IIRC they may have been created by the Daemons at some point in the distant past and realistically are not that powerful. In fact far less powerful than the actual Olympians. Best to think of them as having something akin to Wolverine healing with some psychic abilities - although not all same the powersets. But then again some Hunters can also travel into different universes without a tardis, and into and out of time rifts. Having said that, what about Eternal Champion from Elric, as that is also part of Who too.

EDIT: I mean they're not as powerful as Time Lords who have a Tardis and stuff and lots of tech.