[@Starfall]

[i]The beast hadn't grown. It merely didn't stand up very often. Most of the time it crawled and creeped, dragging its damp belly.

Though the projectile was fast and Satori was able to direct it, the Magna Pater would give avoiding the attack about as much brainpower as it used to chew its food. It had been dodging junk when Jesus was around.

The shadow spike would have been difficult to avoid on its own, had Satori not given away her aim by waving her hand at the monster. The ancient creature would shoot forwards and to Satori's right, using the Stygian muscles of its immense tail to effectively slip past the projectile so quickly that by the time the woman registered its movement, the bolt would have flown past.
She had been expecting it to try and weave to the side, not actually move towards the attack when it was still premature.

Raw power wouldn't work here. It was too smart to fall before anything that had been used on it before, and that included large and nasty things rocketing towards its frame at high speed. It was even anticipating the possibility that a set of amorphous shadow blades might pop out from the spike as it moved past, or some last ditch secret trick of the like, perhaps even an explosion. The monster's foresight was so uncanny that some might have even called it paranoia. 

It had seen enough of Satori's power, and now it was testing the limits of her reflexes. It would have retrieved whatever had been in its body after the evasion, both of its unaccountably lethal arms free to savage what lay before it, perhaps with a fusillade of terrible, reaping swings. It would be upon her in a flash, crossing the fifteen feet between them as if it were but a step. 

Both Satori and Eubie would be in the monster's path, and unless they had a solid defence against being torn to pieces, they would end up like the ghouls.[/i]