Obedience is a Familiar Groove (джен)

Shin had a hand on the reins, a foot in the stirrup, when the compulsion came.
Like a dark flood, it seized his limbs, a hard fist around his bone and sinew that yanked him, unforgiving, to the ground. He dropped, deadweight in a suit of armor.
Though he struggled against the force, muscles straining, heart thudding against the cage of his ribs, he knew it was no use. The Seal bound him to its holder, and if the King who had bound him was careless enough to let it fall to the wrong fingers, that only meant his already grim fate had darkened even beyond his imagination.