Isaac Izard

Evil-doer
Full Name	Isaac Izzard
Alias	None
Origin	The House With a Clock in its Walls
Occupation	Warlock Stage Magician (formerly) Military Soldier (formerly)
Powers / Skills	Dark magic/Witchcraft Blood magic
Hobby	Working on his clocks Witchcraft
Goals	Get rid of Johnathan, his nephew, and the house keeper by any means necessary (even if that meant killing them to reclaim his house) and use his clock to take over the world (failed).
Crimes	Attempted child murder Attempted cataclysm Kidnapping Dark magic Demon worship
Type of Villain	Evil Warlock

“	The greatest magic trick ever. I’m going to make people disappear.	„
	~ Isaac Izzard.

Issac Izzard is the main antagonist of the 1973 American juvenile mystery fiction novel The House with a Clock in its Walls by the late John Bellairs, and its 2018 film adaptation of the same name. He is an omnipotent and evil warlock who was the house's original owner and Johnathan's former friend turned arch-nemesis.

Originally, Isaac Izzard was a resident of New Zebedee, Michigan, and a practicing warlock who, with his wife, Selena, created the Doomsday Clock. The two once lived at 100 High Street, now owned by Jonathan Barnavelt.

He was portrayed by Kyle MacLachlan, who also played King Claudius in Hamlet, Cliff Vandercave in The Flintstones, Killer BOB in Twin Peaks, Earl Raymond Diggs in HBO's Tales From the Crypt, Donald Love in Grand Theft Auto, and Calvin L. Johnson in Agents of S.H.I.E.L.D.

Biography

Originally, Isaac Izzard and his friend Jonathan Barnavelt were a magic duo, touring the country and performing their shows, using real magic without anyone knowing. Then the Second World War broke out, and Isaac enlisted in the military. The horrors he saw in the war turned him bitter and spiteful of humanity, which was heightened one fateful day. His unit was ambushed in battle, and he fled into the Black Forest, where he wandered for days. He used every spell he could think of with one thought in his mind: to undo all of it, all the horror and hardship and suffering he had been through. This had the effect of summoning the being who gave him the means to do just that, the demon prince Azazel.

Azazel and Isaac made a deal which gave Isaac the blueprints for the Clock. Upon returning home, he married the wicked witch Selena, and they shut themselves away, until Isaac's death trying to cast blood magic, which caused a blast on energy. Before he died, he hid the Doomsday Clock in the walls, made so when the time is right, he can reset the world to the beginning of time, and then stopping it to continue once more. 

About a year later, Lewis Barnavelt goes to live with his uncle after the death of his parents in a car crash. Soon after, Isaac somehow returned as an undead being with Selena in tow, and after capturing Lewis, Johnathan and Florence, he revealed his diabolical plan to rewrite history so that mankind never existed. However, they were ultimately defeated when Lewis used the Magic 8-Ball to stop the Clock's activation, erasing Isaac and Selena from existence.