Anti-Spiral.
I've never really been interested in what characters can theoretically do, but rather what they've shown. For example,
The text implies Lelouch is invincible and with The Zero he can turn anything into nothing. I can see where you're coming from
What's the strongest attack he's shown to blow off like this? If it's above AS demonstrated power output, then I'd agree; he's invincible for the purposes of this match. If not, well, then it's not as convincing.
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"Give him a fair trial. Then shoot him." - Napoleon Bonaparte after the capture of Andreas Hofer