Comments: A Victorian-era scientist obsessed with evolution in all its forms, Nathaniel Essex allowed the immortal warlord known as Apocalypse to augment his body and strip him of his humanity. Now, he is Mr. Sinister - master manipulator and expert geneticist working to create the most powerful mutant the world has ever seen! A brilliant biologist and geneticist, Mr. Sinister is also immortal - granting him a unique perspective on human evolution. Sinister can manipulate his molecular structure, this altering his appearance and shape. Also, he possesses superhuman strength and an accelerated healing factor.
Source: Marvel Comics - Uncanny X-Men, X-Man
Assortment: Sentinel Series
Sentinel Right Leg
Note: Mister Sinister includes an extra accessory to build a Sentinel figure.