Nightwing (1996-2009) #150

"The Great Leap" part 4, a "Batman R.I.P." tie-in. Special over-sized issue! Believing Nightwing responsible for the death of an old flame, Two-Face has sworn his revenge upon Batman's first Robin and New York City itself. Armed with the same acid that turned him into Two-Face, Harvey Dent plans to scar half the population of New York to make them pay for his loss.