sentences:  The heroes rush to the Purifier main base, Fort Stryker, in order to destroy the superweapon and apprehend Stryker.However, when they arrive, they find that Stryker is already under attack by Magneto and his Brotherhood of Evil Mutants in retaliation for their attack on Mutant Town.Magneto threatens to kill Stryker, but the heroes refuse to let this happen and defeat him.