Not Much......Initially

Garrett Had Been Commanded To Infiltrate Vandal Savage's Organisation, Which Was A Part Of The Reason He'd Been Having Miss Martian Place Psychic Blocks On His Mind, To "Hide Resentment". Garrett Had No Doubt That There Was Going To Be Some Form Of Psychic Interrogation in This Infiltration, The Light Had Been Disrespected By Aqualad So Easily Infiltrating Them, and Garrett's Readiness To Join Would Be Very Thoroughly Scrutinized. He Was Well-Known In The Heroic and Scientific Communities, As Well As The Magical Community, A Fine Addition To Be Sure, But Vandal Savage Was Known As Marduk, Julius Caesar, The Great Genghis Khan, and Attila The Hun, So Garrett Had To Get A Way Inside Savage's Distrustful Heart. Cassandra Was His Way Inside, Because Like Ra's Al Ghul, Vandal Believed In The Survival Of The Fittest and As Such A Daughter Of His Pursuing A Relationship With Garrett Was A Representation Of That Belief.

Garrett Represented The Precipice Of Human Evolution Reaching A New Evolutionary Cycle. Garrett Was An Ordinary Human Until His Body Was Mutated With Tiger Genes and Meta-Powers. Then Savage Had His Genetic Makeup Further Enhanced and Exploited To Incorporate Kryptonian, Amazonian, and Atlantean DNA Along With A Reach Scarab and Later On A Crash Course In Magic and Eventually A Acquisition Of Magical Knowledge and Power. Garrett's Research Was Centered Around Genetic Augmentation and Rejuvenation, He Specialized In Improving Human and Alien Genetic Traits and Using Them To Improve The Human Race. Because Of Garrett's Work The Patents In His Name Were Worth Billions and With Wayne Enterprises Cutting Him Loose, He Needed A New Patron and With Lex Luthor and Vandal Being Both Official Members Of The Light As Well As A Part Of Its Founding Membership, LexCorp's Acquiring Of His Talents Would Be A Monumental Corporate Investment In LexCorp's Future Projects.

So Garrett Had Batman Fire Him and Effectively Put A Roadblock At Every Avenue Available, Even Freezing His Accounts. Eventually Garrett Knew Luthor Would Come To With An Offer. So, When Garrett Started Stealing From The Criminal's He Busted To Just Survive, Luthor Finally Paid Him A Visit.

Garrett Had Been Scouring His Cupboards To Find Something To Offer Lex, Before Lex Offered Him A Deal. The Financial and Political Capital To Get Back His Old Life, and Surpass Wayne Enterprises, In Exchange He Would Work For LexCorp and Become A Light Enforcer For The League Of Shadows. Having No Other Options, Garrett Agreed, But Had Offered To Sell His Three Least Profitable Patents and One Of His Best If Luthor Instead Granted Him Enough Influence and Power To Fund A War Of Politics and Economics Against Wayne Enterprises. Garrett Offered Lex Two Things, Batman's Secret Identity, and A Way Inside The Man's System. Bruce Had Instructed Him To Do This, So Where Garrett Attacked On A Public and Corporate Front, Lex and The Light Did So From The Shadows and On A Political and Heroic Front.

So That Risky Gambit In Effect, Garrett Was Positioned Perfectly To Infiltrate and Destabilize The Light. Which Was How Garrett Came To Be Sitting In A Corporate Tower Twelve Floors Higher Than Wayne Tower, Centered Around Human Advancement.

Garrett Was Reviewing His Initial Stock Prices, and Was Pleased To See Them Rising Due To His High-Profile Deal With LexCorp. Now Retitled Caine & Luthor Enterprises, The Business Was Fighting Back Against Former Partner Wayne Enterprises, and Garrett Had Expanded Significantly, Having Subsidiaries and Offices In Every City Of Every United Nations Member Nation Save Themyscira and Atlantis. Naturally The Regional Headquarters Was In Each UN Nation's State Capital, But Garrett Maintained His Personal Offices -In Addition To A Regional HQ- In The City Of Central City. The Offices Were The Most Advanced and Secure On Site, The Head Of Security Was The Former Belle Reve Warden and She-Wolf, Amanda Waller. Waller Led The Entire Corporate Security Force, and Went By The Codename Mockingbird.

Beneath The Building Was Highly Secure and Secret Research Lab and Archive Where Apokolipton Technology Such As Father Box and Powerful Weapons Or Energy Sources Were Experimented With and Improved. But Garrett Also Used It For Less-Than Legal Research, Such As Genetic Splicing Between Humans and Animals, Or Combining Magic With Technology. To Facilitate His Infiltration, Garrett Made A Deal With A Devil King, Becoming A Demon Of Vengeance Through A Deal. The Spirits Of Three Satans Entered His Body. Leviathan, Asmodeus, and Gremory Entered His Body, He Became A Lord Of Destruction, A Lord Of One Of The Three Forces Of Dark Magic. Where Klarion Was A Lord Of Chaos, He Was A Lord Of Destruction, The Third Would Need To Be A Lord Of Death. The Counterparts For Death, Destruction, and Chaos Were Creation, Destiny, and Order In That Order. Though The Deal Required Seven Satans, Garrett Negotiated For Just Three. Seven Would've Overridden His Mental Control, Three Gave Him Power, But Not Enough That He Was Beyond A Cleansing Ritual.

The Demons Tried Imposing Their Wills On Him, But Garrett Had Practice Quieting Voices In His Head, First With His Tiger Powers, Then The Scarab, But He Was Still Extremely Susceptible To Their Control When Stressed, Angry, Or Tired. So, He Took To A Strict Training and Therapy Regimen. Two Hours Of Krav Maga Or urban Krav Maga, One Hour Of Parkour, An Hour Of Meditation, Two Hours Of Simulated Combat, and One Hour Of Sauna and A Massage. He kept His Body Honed and Mind Sharp, Ready For When The Light Called On Him.