For most people, including Ticci, Galen is invincible.
Even if kryptonite existed later, Galen's invincible name would not be broken, and Tiki never thought of doing anything with it.
After all, kryptonite has the same effect as the sea tower stone, but who can easily subdue those powerful people with the sea tower stone?
Ticci knew that his strength was far from that of Galen, so he just hated Galen in his heart. He occasionally used some spiritual victory methods to recuperate himself, but he never thought of finding Galen for revenge.
And now
that...