Speaking of revising GURPS Magic, I was re-examining one of the revisions I made back in January on Sleep, Daze, and Awaken.
In it, I mentioned allowing Awaken to specifically counter Sleep and Daze.
But as I re-wrote it for my house rules printout, I got to thinking - why not handle it as any other spell vs. spell situation?
"Sleeping or unconscious subjects, including those under Daze or Sleep spells, get a HT roll to awaken, at a bonus equal to the caster's margin of success."
"Daze or Sleep spells resist Awaken with an effective skill equal to the original caster's; Morpheus elixirs gives a -4 penalty instead."
(That last bit is so Morpheus, which is HT-4 to resist, is consistent in effect without needing to assign it a skill to roll against.)
After all, I figured, that's how Counterspelling Daze or Sleep would work, and allowing Awaken to work as a counterspell as well as a wake to wake people from mundane sleep or from injury-induced unconsciousness seems fair. They overlap in the Venn diagram of counters to Sleep and Daze.
This does make it clear, too, that if you take person with Sleep on them into a No Mana Zone that they'll either wake up (as the spell ends) or just be in normal sleep. I will run it at the latter - you revert to normal sleep. Obviously, an NMZ just wipes out Daze because the spell ends. It also makes it clear that I stick Sleep onto the side of the dividing line between "spell that has a lasting effect" and "ongoing spell." So while, say, Fireball does some damage or Flesh to Stone petrifies you and that's that (and thus they don't resist spells to put out the fire or un-petify you), Sleep is akin to Daze where it is an ongoing spell.
I can easily see ruling the other way - saying Sleep hits you, has its effect, and then the spell is over but the effect lasts, but I think I like the campaign effects of saying it's ongoing, but doesn't count as a spell "on" - much like Create Object doesn't.
Otherwise, everything is as written in my previous post. I think this makes Sleep a little more potent, brings Awaken's effects in line with any other spell vs. spell situation, and clarifies an edge case with NMZs.
I'm still thinking about this one, but I think I want to give it a try. Any implications I'm missing here?