Yeah, WD266 (it's the one with high elves on one side and the balrog on the other). The only armies that may not take kroot as mercenaries from that list are; Tau, Space Marines, Tyranids, Sisters of Battle, Necrons. You are also able to field the kroot as a seperate army. Be warned however, the entries in the WD article are not the same as the kroot entries in Codex: Tau
-={ Sytoru }=-