Coagulation is a Blood-typed offensive move.
It… really shouldn't be used against humans.
The effect is hideously painful, like a fire in their veins - a strange red filter layering across their vision, the colours bleeding out of the world, leaving a ghastly, bleak, monochrome variant of it, and all sounds but for their own heartbeat drowning out. …it's like they can't breathe, as though the world had stopped in time, leaving the air particles refusing to move, but them requiring it, still.
It hurts terribly, a furious ache, sapping them of their energies quickly. Weakest, and paralysed by the fear from the situation, not having pokémon herself, Neike's the first to collapse on the ground, out cold, sprawled at an awkward angle. It knocks Marcus out, too, before it stops, leaving Devi and Nikki collapsed on the ground, still in agony, almost helpless. The boy chuckles darkly, the sound echoing strangely in their perceptions, despite their senses having returned to normal, and slides down from his Tyranitar's shoulder, onto the paved ground, walking across and over to them.
~Arsaga, Ehqaj City, suffering the Tyranitar Trio.
In case the name isn't a hint, it's Sehto's Andromeda Strain, in that it will nudge your blood into a state of coagulation. The process doesn't usually complete; needless to say that if it did, it would result in death every time.
It can roughly be considered the Blood-typed equivalent of Magnitude - its strength varies greatly, and at its strongest, it will kill its victim. Furthermore, it has a low accuracy (in normal battle situations, it'd be hard for it to exceed 70% even with stat increases; although on immobile targets, it's the Sehto-typical 100%), which means it's almost never used by wild Blood pokémon, and rarely in trainer battles, but it's quite an excellent choice for a gang of pokémon used for assault.