Quote:
Originally Posted by Barmace
A Creation Spell for a given area includes all the spells
of the same type for lesser areas. For instance, a wizard
who knows 3-Hex Fire is also assumed to know the one-hex
Fire spell, at no extra IQ cost. A wizard with 7-Hex Illusion
automatically knows 4-Hex Illusion and Illusion . . . and so
on.
Does that mean that when they reach the next level spell that it is for free?
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Fire spell ITL p 19
A wizard may also use this spell to produce controlled fire in his own or an adjacent hex. He could light his own cigar, a friend’s torch, or an enemy’s beard.
Thus, someone who knows 7 hex fire can control it down to 3 hexes or just light that cigar. Edit: This sentence and the one below are my conclusions from the quote above.
As far as working your way up the Fire Hex Chart, if you already know 3 hex fire and buy 7 hex fire, well you can light one to seven hexes.
However, I would consider the lower Fire Hex spells to be pre-requisites for the bigger ones. So you'd have to buy 3 hex fire also to buy 7 hex fire on character creation.