SR3 page 160 says:
QUOTE |
Elementalists can only cast spells and summon spirits related to one hermetic element. <snip> ... [ may use ] sills for all other purposes ... but must subtract 1 die from their skill for spells or spirits of their opposing element. |
QUOTE |
... elemental mages [ gain ] +2 dice for spells and spirits of that element. The penalty for such specialization is that the mage suffers a -1 die penalty for spells and spirits of the opposite element ... <snip> A fire mage for example has +2 diece for combat spells and fire elementals but applies -1 die for illusion spells and water elementals ... |