From page 184 (20A edition core)
QUOTE
Many spells can be sustained for as long as the magician is willing to concentrate on the spell, as noted in the spell’s Duration.
also from p184
QUOTE
If the gamemaster chooses, certain circumstances may threaten to break a magician’s concentration while she is sustaining a spell, such as
taking damage, full defense, dropping prone, and so on.
taking damage, full defense, dropping prone, and so on.
I take this to mean that in situations where the magician is unable to concentrate (going to sleep for the night, for instance, or otherwise going unconcious), the sustained spell dies.
What about sustaining spells while being possessed? If my mage casts increased reflexes on the Street Sam, and then fails his int+will roll to fight off an enemy task spirit, does the Street Sam stay boosted, or am I unable to sustain it?
From SM p102
QUOTE
The mind of the vessel remains in whatever state it was when possession began; if conscious, it becomes an impotent witness locked inside its own body for the duration.
Does this "state of mind" of the vessel magician include concentrating on sustaining the spell? If so, can I cast increase reflexes on myself, have a spirit possess me, and have the spirit romp around with a boosted 4IP? Or does my physical mask spell drop upon possession?
Since (from SM p101)
QUOTE
the vessel and the critter are considered a single dual-natured entity for the duration.
Does the spirit take a -2 penalty from sustaining the spell?
Under counterspelling sustained effects (20A p185)
QUOTE
Counterspelling also allows a magician to dispel a sustained or quickened spell, canceling its effect. The character must be on the same plane, must be able to perceive the spell she is targeting, and must use a Complex Action.
Does this imply that sustaining too needs to be done from the same plane as the spell effect (so Astral perception / projection might disrupt physical spells), or simply contrast to countering spells as they are cast, where the magician can counter spells even if (s)he cannot perceive them.
I saw no clarifications from the SR4 FAQ
Thanks in advance
--gargaM0NK