You sure about that?
I'm actually not 100% as there are a few lines in the rules that give me pause. None of them actually contradict my interpretation though, so I am fairly confident I have made the right judgement. The line that you highlighted was one of the bigger things that caused me hesitation, that is until I stopped focusing on the last half of the sentence and began focusing on the first half.
When you cast an attack spell, it is both a spell and an attack.
This qualifying statement means the sentence is not in disagreement with the interpretation that attack spells are not inherently an attack themselves. Before they are cast, they are simply spells. It is only
when you cast them that they become attacks.
I have read through the rules sections that I feel would be relevant a few times now, and while there are a few statements that are not crystal clear and allow for some confusion (like the one Ringkichard pointed out) none of them actually contradict my conclusion. Meanwhile, throughout the rules it seems clear that the spell and the attack are treated as two separate entities with the attack only occurring after the spell has resolved.
If its a no, is Arcane Zap then the same?
As baronzaltor clarified, Thorg can not taunt Mages. If he was able to though, then by my reading of the rules you would not be able to use Arcane Zap.
I have always considered an "Attack Spell" to be an attack. My reasoning has been that it can be countered with Defenses and Intercept (unless unavoidable) and therefore has to be an attack.....
The rules are very clear that the attack occurs after the spell has resolved. At that point the attack can be countered with Defenses and Intercept, but the spell itself can not. It has already finished casting. With the current attack spells available to us, this is a matter of semantics as it amounts to the same thing (the card has no effect). However, if we had some type of attack spell that had an effect independent of the attack, then successfully avoiding the attack would not negate the effect.
For example, imagine an attack spell that in addition to making its attack also gave the caster Flame -2 until the end of the round. Upon resolving the spell, they gain the Flame -2, then they make their attack which their opponent stops with a Block spell. They will still retain the Flame -2 however.
It'd still be best for someone to clarify,
I will add it to the list needing clarified.