The blade hadn't even made contact with the opponent's body before it was abruptly halted mid-air without advancing any further.
Leonard Churchill retrieved the flying knife in a hurry. It was just this one touch that made him realise that this method could counter his flying knife. But what was of greater interest to him was a newfound curiosity: "Wow, this guy became very strong after advancing to the third tier..."
After all, they both practiced the same Breathing Method and were both Air Skill Masters.
This technique, with a single glance, reveals mastery and cleverness.
A Third Order Card Master like him wanting to condense his Curse Seal will need both opportunity and realization.
A Curse Seal is like knitting a sweater, different professions mean different methodologies, almost everyone knits different patterns.
The effects are also different.
The designs are various geometric patterns, various lines... usually a single element forming a closed loop.