Jackson Lamb (Black) fanfic, no cp in the main plot, there will be brotherhood
When Harry Potter met Slow Horses
Big bastard Jackson Lamb traveled through time!
Become Black and save the Order of the Phoenix, and see how Muggle tactics turn the Death Eaters around.
Wizard? A bunch of trash who can only wield sticks
MI5? A group of fat pigs eating nothing but corpses
For Lamb/Blake, the happiness of himself and his godson is the only goal
Purpose: Long live brotherhood