Bleach: Chapter 344 [Spoilers]
Credits to Ann-chan. Highlight the spoilers to read:
OMG, Ulquiorra's release next chapter![/excited]
Yammi comes out of the hole in the ground made by the explosion with his left hand.
石田に捕まっている手前の床を矢で撃たれて地上の階まで落ちたっぽい(石田はここに来る途中に 全ての階のい くつかの柱を壊した)
By firing an arrow at the alcove on his side, Ishida apparently caused the upper floors to collapse (On the way there Ishida broke some support pillars on every floor)
Ichigo is surpised at Ishida's appearance and they talk.
Ichigo says he'll leave Inoue to Ishida and that he'll take on Ulquiorra by using his hollow mask.
Because the odds are against Ulquiorra, he escapes to above the Las Noches dome.
There, he says that Espada of #4 and above are not allowed to release under the dome.
Chapter ends with him chanting the release.
The release is "Lock".