Three minutes later.
Above the fortress's cloud layer.
Watching the giant fortress below, Lin An warily spread his mental strength over a hundred kilometers, confirming that the last batch of Third Order mutants had flown out.
After his constant observation, nearly all the Third Order mutants who had gone out to search for him had already been dispatched.
Those left behind were mutants who did not need to carry out missions.
There were no traces of Fourth Order aura nearby, which meant that even if a Fourth Order suddenly appeared, he would have a full minute to react. Even against an Overlord, he would probably have around seventeen seconds to escape.
Although it was somewhat unfortunate that he had let some of the Third Order mutants go, there was nothing he could do about it.
Killing those Third Order mutants would make his target far too obvious.
"How should I kill them?"
Within the highly corrosive, deep-yellow clouds, Lin An's eyes flickered as he looked at the large number of mutants on the ground and constantly considered how to make his move.
The optimal solution would definitely be to cover the entire area with mental strength, then instantly blow up the mutants' heads.
With his current mental strength, he could probably kill them all with four or five consecutive bursts.
Without being able to see him attack at all, the mutants would not even have a chance to use the System's functions to transmit a message.
But
"There are no volcanoes nearby, and the ground doesn't look capable of triggering an earthquake."
"Using a mental shock to kill them all would indeed be convenient, but the corpses would be too conspicuous."
"Even if I shattered the corpses after killing them, they would still notice that something was wrong."
"The ring