In "DCU: Last Will and Testament", Deathstroke takes credit for Terra's insanity by claiming he gave her the same serum he used on Cassandra Cain and his daughter, Rose Wilson, telling Geo-Force that "the problem with Terra was that we waited too long. By then the psychosis was so bad, she tried to kill us all." This contradicts his earlier account of her lifelong insanity in the Titans stories following "The Judas Contract," although it is possible that Terra had mental issues from the start and that Deathstroke's serum served to exacerbate them, to the point where Terra had her psychotic break that resulted in her death.