Shadowrun > Les Shadowforums

SR4, p168

Just how obvious are magical skills? Not very, since most
spells and spirits have little, if any, visible eff ect in the physical
world (unless the magician prefers to have fl ashy eff ects, or her
tradition calls for it). An observer has to notice the magician’s
intense look of concentration, whispered incantations, and
small gestures. Magicians of some traditions display a more
visible change when practicing magic known as the shamanic
mask. Th e shamanic mask typically changes the magician’s
features temporarily to display characteristics appropriate to
her mentor spirit or tradition—an eagle shaman, for example,
might seem to have feathers or beaklike features while spellcasting
or summoning.

Noticing if someone is using a magical skill requires a
Perception Test (p. 117) with a threshold equal to 6 minus the
magic’s Force—more powerful magic is easier to spot. Th e gamemaster
should apply additional modifi ers as appropriate, or if
the perceiver is Awakened themselves (+2 dice), astrally perceiving
(+2 dice), or if a shamanic mask is evident (+2 dice).

SR4A, p179

No ticing Mag ic
Just how obvious are magical skills? Not very, since most spells and spirits have little, if any,
visible effect in the physical world (unless the magician prefers to have flashy effects, or her
tradition calls for it). An observer has to notice the magician’s intense look of concentration,
whispered incantations, and small gestures. Magicians of some traditions display a more
visible change when practicing magic known as the shamanic mask. The shamanic mask
typically changes the magician’s features temporarily to display characteristics appropriate to
her mentor spirit or tradition—an eagle shaman, for example, might seem to have feathers
or beaklike features while spellcasting or summoning.
Noticing if someone is using a magical skill requires a Perception Test (p. 135) with a
threshold equal to 6 minus the magic’s Force. More powerful magic is easier to spot with
the gathered mana normally appearing as a disturbance or glowing aura in the air around the
caster. The gamemaster should apply additional modifiers as appropriate, or if the perceiver
is Awakened themselves (+2 dice), astrally perceiving (+2 dice), or if a shamanic mask is
evident (+2 dice).

Au moins une traduction française dit l'opposé, en parlant de sorts qui font systématiquement des effets kikoo.

Un masque chamanique pour un sort de bas niveau, ça reste discret : par exemple, un chaman aigle lançant un sort de bas niveau verra son nez s'allonger pour devenir un petit peu plus acquilin, la tête d'aigle avec plume, c'est pour le haut niveau.

Si on me demandait mon avis, je dirais qu'il serait bon d'ajouter le grade d'initiation au seuil de détection, à la condition que le personnage possède masking, et que le joueur considère l'initiation comme un puit sans fin de roleplay et non pas uniquement comme un moyen de lancer plus de dés.