After some gentle persuasion, Sword10 could not help but agree to Lin Huang's ridiculous request.
The main reason was that he knew very well that if he waited for the next candidate to show up, it might be another 300,000 years or even three million years.
As a member of the Succession Sect, since 300,000 years ago he had been hoping for someone worthy to come and take over the swordmaster's inheritance. Now that 300,000 years had passed, his hopes regarding the arrival of the swordmaster's heir had become even more pressing. He really did not want to wait any further.
Another reason was that he had been incredibly bored over these 300,000 years.
It would not matter even if he spent time training Lin Huang and the lad failed to obtain the swordmaster's inheritance in the end. At least Sword10 would have something to occupy his time for a while.