Board Thread:Speculation House/@comment-27125187-20151103110725/@comment-27087951-20151104004013

But you are assuming she can only make plain Ilusions with no depth, 2D but never 3D. So she would have to stack multiple ones to even get close to 3D and avoid the trick failing.

For all we know, she may well be capable of making 3D Ilusions, so making just 1, at worst 2, would be the most she would ever need.

And you assume it's 2xYxZ, where Y is number of Ilusions and Z is each milisecond. It may well decrease slower than that, like every 2 seconds instead. If it was really every milisecond, her Semblance would be useless, it would drain in less than 10 seconds even if not doing much.