The process wasn't complicated in the slightest.
It enters the body of a creature, making its way into its nerves, muscles, tendons, and takes full control of them.
It also enters the brain as it infects it, taking full control over all motor functions of the body and killing the being in the process.
The whole thing shouldn't take more than ten seconds on average.
And yet something happened.
Something that it hadn't ever experienced.
Ten seconds passed, twenty seconds, thirty seconds, a minute, and yet it hadn't taken control yet.
Something was stopping it. Like there was a wall that didn't allow it to go deeper. Not metaphorical—a literal wall.
'Is that blood?' the thing asked itself. The blood of the man had moved in such a way that it didn't allow it to gain access to the brain or the nerves.