Batman And Robin Eternal #21

"Everything that can go wrong does in both the past and the present! Batman spent years believing Mother was dead and when you see their blood-soaked confrontation, you'll know why! Now that she's returned in the modern day, Batman's allies will find themselves under siege from a world-destroying weapon they never saw coming! And on top of everything Harper Row learns a devastating secret that will change her life forever-and potentially make her the most dangerous foe the Robins have ever faced!"