Chapter 7 on lunatic+. Miriel has enough mt to literally oneshot the wyvern riders. At the start of turn 5, three reinforcements spawn, everything according to plan. What I didn't plan for was for these guys to spawn with both, Counter AND Aegis+. Miriel avoided the 27 percent chance to hit attack, but died to counter since Aegis+ prevented a onehit K.O. This is some next level BS right there.