Grandfather's Gift

When Mortarion, daemon primarch of the Death Guard Traitor Legion, awakes in a strange garden with no memory of who he is, he cannot know what delights await him in its rotting tranquility. Above all things, Papa Nurgle is a generous god. 

Read it Because
It's a Horus Heresy tale involving Mortartion and Nurgle… a delicious (or maybe not so delicious) taste of things to come for the Lord of the Death Guard, perhaps?