Im working on a new character and have been reading up on some of the classes.
I was reading the magus class and their spell combat ability.
At 1st level, a magus learns to cast spells and wield his weapons at the same time. This functions much like two-weapon fighting, but the off-hand weapon is a spell that is being cast.
Since you are allowed to use the spell for the purpose of two weapon fighting, does this open up the whole two weapon fighting tree?