Bloodlines was an intracompany crossover that spanned all of the annuals published by DC Comics in 1993. The event was bookended by two Bloodbath specials, written by Dan Raspler, with issue one at the beginning of the event drawn by Chuck Wojtkiewicz and issue two at the end of the event drawn by Sal Velluto. The alien parasites premiered in Lobo annual vol. 2 #1 written by Alan Grant and drawn by Christian Alamy.