The Citadel of Chaos

As you step out of the shadows towards the centre of the courtyard,
a voice in the wind cries, 'Halt! Stand your ground!'
You whirl about but can see no-one addressing you.
You take another couple of steps.
Again, the eerie voice orders you to stop,
and this time an arrow zings through the air and lands close to your left foot.
You jump back. Still you can see no-one.
But now you are stuck.

Will you:

Press on forwards, very cautiously ?

Make a dash for the monument in the centre of the yard ?

Cast a Shielding Spell around yourself and advance ?