Malcator is the head of the executors of the Great Synthesis. He is in charge of determining what is deemed abomination and what is deemed ideal as per the scientific edicts and illumined scriptures of Jin-Gitaxias. The executors are interpreters of Scripture and executors of his will. They oversee all flesh created by the other sectives and make certain it adheres to the Gitaxian Standards of Purity.

"The whole of Phyrexia hums along every nerve fiber, guiding my sense of design as I create a new breed of Phyrexian on this metallic world. The will of the Father of Machines shall be realized in every compleated creation that I deem worthy to receive the blessing of our scalpels." -Malcator, Gitaxian sective

"This creature is inadequate. Send it to the splicers for innovation." -Malcator, Executor of Synthesis (Vapor Snag)

"Why infiltrate their strongholds when what we seek resides in such a poorly guarded safe?" -Malcator, Executor of Synthesis (Mindculling)

"You have an unhealthy attachment to your selfhood. I can help you with that." -Malcator, Executor of Synthesis (Soul Conduit)

"Let's show Vorinclex that progress doesn't always need teeth or claws." -Malcator, Executor of Synthesis (Spellskite)