1% drop rates... a thought expriment.

[Amnesia]

So, at 1% drop rate, we wouldn't expect to see a mirror until we'd beaten Levi EX 100 times.

No, that's not right.

At a 1% drop rate, you'd have to beat it 69 times before you have a more than 50% chance of getting it. (that's 1-POW(1.0 - 1%, 69) = .5001)
After 100 times, your probability goes up to 63%.