Collects the Mutant Massacre story arc.
Included issues:
Uncanny X-Men #210-213
X-Factor #9-11
New Mutants #46
Thor #373-374
Power Pack #27
— Description from Comic Vine community (comicvine.gamespot.com · https://comicvine.gamespot.com/x-men-mutant-massacre/4050-30972/).
