As the soft and cold breeze of Hueco Mundo creates a shiver down your spine, you see green eyes looking at you at the top of a very high and old pillar. All you can see is a green shadow in the lonely moon of hueco mundo. You rub your eyes and blink twice, and the shadow is gone. You cannot shake off this feeling of alarm, as if something is terribly wrong. All you can notice is the dense air and dead hollow masks. The wind began to slowly become slightly stronger. You feel uneasy.

The shadow is there again. There is no mistaking. There is someone looking at you on top of the pillar. The trees don't grow here, as if they are scared of something. The hollows don't reside here, as if they have been killed. You blink again, and the shadow is not on the top of the pillar. You can smell a extremely strong smell. It's the smell of death and despair.

As the moon slowly gets out of the clouds, its dim light slowly illuminates the entirety of hueco mundo.

You turn around and the shadow was sitting on a rock, seemingly eating something. But this time, it wasn't a shadow. It was clear radiant emerald green eyes could be very clearly be seen. The number 4 tattoo on his chest, unmistakable. The hole on his sternum, hollow. The mask he is wearing, broken in half.

You were at the mercy of Ulquiorra Cifer, The 4th Espada.