Forerunner temporal manipulation 3

Prone did no more than lead him in the right direction. Huragok generally spoke when spoken to and volunteered nothing. But why would they? They were just machines. Jul could see the irukan now, a long, broad strip of yellow-green leaf topped with white spikes of seed heads that stretched over the brow of a small hill. That in itself was incredible. The crop took two seasons to mature, but here it was, growing and ripening in what could only have been days. It took longer than that to germinate. He remembered playing in the fields around Bekan as a child, digging up the seeds from the furrows while the Grunts who were still busy sowing it made angry gestures at him.

“How did they achieve that?” he asked. “How did they make it grow this fast?”
<Many techniques,> Prone said. <And we created a bubble for them.>
Jul struggled with the word bubble. “A glass house? A plant shelter?”
<Slipspace. A time out of this time. Sometimes slower, sometimes faster.>
No Huragok he’d ever come across could manipulate time. That made these creatures even more dangerous as a weapon for the humans to use.
(Halo:The Thursday War; Ch.8)