Memoriam 1.2.3

Trap Floor: The next five enemies who attack, at any time, are Blinded [50% miss chance.] The punishments automatically have one of Memoriam's Break uses for the turn added on. The blind lasts multiple rounds if the same enemy attacks several times. 3TCD
Is this attack Autohit?

No? I guess a quick enemy could avoid it.
See note on other sigs.