Within the Sword Domain, there is a certain kendo devouring power that can consume certain sword technique attacks.
This is why the sword qi Lin Dong previously slashed into Lin Sumei's 'Sword Domain' vanished without a trace.
Of course, this devouring and disintegrating power clearly has a limit.
When kendo power exceeds that limit, the Sword Domain cannot consume it.
Then, those kendo powers will harm the master's Sword Domain.
Now, this sword from Lin Dong's Buddha-Demon Embodiment has reached the limit of Lin Sumei's Sword Domain's devouring power.
So Lin Sumei can only summon the defense of his 'Sword Domain' to resist Lin Dong's sword.
The Sword Domain is like a kendo formation; in this domain, the master can use the kendo power inside to defend and attack.
When all kendo powers inside the Sword Domain are used for defense, the defensive power becomes extremely terrifying.