An'ggrath

An'ggrath the Unbound is the Bloodthirster Khorne points at when Skarbrand is not enough and subtlety would be an insult. In ten thousand years he has been successfully summoned into realspace twice. Both times Imperial cartographers had to redraw the neighbourhood.

He is the upper end of the Conclave Diabolus, a winged slaughterhouse with a reputation Grey Knights treat as a weather warning. Worlds do not 'hold' against An'ggrath. They delay the paperwork. The Unbound does not do garrison duty. He arrives, erases, and leaves a silence that still smells of brass.

Khorne has many hounds. This one is the one you do not whistle for unless you mean it.