: Nope, they're definitely not pairs. In TFL we went from
: Tyr to Covenant with an archmage's help; in M2,
: Madrigal to Covenant and back with no archmage, but
: then also the Plain of Scales to Madrigal with no
: archmage. So Madrigal's knot goes to both Covenant and
: the Plain of Scales? No, I don't think so.
And as surmised earlier, the changing symbol could have
something to do with where a knot is sending to/receiving
from.
Something else ... we know that Garrick's party wasn't
expected, so someone in their party must have activated
the knot. The Jman is a good guess, but the dwarves may
have had some knowledge of how they work too seeing they
alone knew how to fix the broken pylon.
Here's an idea. Something in the construction of the
knot makes them relatively easy to use for Light folk,
but prevents even master-mages like the Watcher from
using them. I mean, surely the Watcher would have figured
out how they work if it was purely a matter of simple
magic.
Along this vein, it would make sense that the Deceiver
was able to use them. Not only does he have impressive
teleportation abilities of his own as seen in-game, but
I reckon that he was able to 'deceive' the knots into
thinking that he was a member of the Light, and hence
persuade them to work.
cheers,
-Iron