Calling All My Familiars to Fight

"All that effort for a thumb," Timmy said as if it was something small that doesn't bother him at all.

"Well then, you tell me when was the last time you can grip your katana without using your thumb? And it's the thumb of your dominant hand as well. Even if you're strong, you have no choice but to adjust your the way you hold your weapon, right? Using an unfamiliar method, even if I'm weaker than you, it should be difficult. How about I cut off your other thumb as well?" I provoked Timmy even further.

Like usual, I provoked my opponent so that his move will be more predictable. But this is Timmy I'm fighting right now.