They knew too little about the Proxy Agents. Initially, they thought the Proxy Agents were merely elites among the Dusk mercenaries, but it turned out they were not elites at all; they were bosses!
"The tree over there has a unique aura, seemingly related to the world itself, but now we need to cut it down."
Without the outer layer of spatial protection, the barrier formed by the tree is very fragile. They could even directly deploy some combat weapons over there.
Although they can't perform synchronous replacement with parallel space coverage, in that environment, the resurrection speed of the deployed combat weapons would be faster.
More importantly, the independent space in the dark environment is inherently akin to a ship. While Zheng Yichen's tree can ensure that life exists normally here, it's equivalent to swimming with one's flesh.
Everything over there can be remotely observed by them.