Complex sentence: After successfully negating S.H.I.E.L.D. 's five Mandroids Tony set his sights on another of his inventions, the Guardsmen, charged with guarding the supervillain detention center known as the Vault.
Split into simpler sentences: After successfully negating S.H.I.E.L.D. 's five Mandroids Tony set his sights on another of his inventions, the Guardsmen. The Guardsmen were charged with guarding the supervillain detention center known as the Vault.