Those units do not show an ability icon do they? For Fortune Telling, or any other (negative) ability? I'm certain that those units use another mechanic, god knows why.
It was considered common knowledge since I got here that every unit rerolled individually against the bad event, rendering them somewhat less useful than they look. However, someone did perform tests fairly recently that showed that a sum total of (100) Fortune Telling was 100% effective.
And I love this baby. You people just fear what you don't understand.
He's my beautiful baby 8 eyed boy. He's special. <3