At this point in time, the two individuals at the Foundation Establishment Peak and the other six at the Foundation Establishment Stage were so exhausted that they slumped to the ground. They had been constantly channelling their True Essence just a while ago, leaving their bodies pretty much drained, feeling more fatigued than if they had just gotten out of an intense battle.
The Half-step Golden Core, due to the blood oath, no longer pressured the two at the Foundation Establishment Peak, nor the six at the Foundation Establishment Stage, instead, with a casual point of his hand, he once again ordered another cultivator at the Foundation Establishment Stage, "You, go open the coffin."