If Kaiba ever broke his arm and couldn't duel he would either

A. Be insufferable as shit and do nothing but make it everyone's problem

B. Invent a one handed Duel Disk

C. Make Mokuba hold his drawn cards for him and strap his Duel Disk to his good arm

D. Find a way to make it Yugi's problem specifically

E. All of the above

This reminds me of a funny scenario in which

Circumstances arise to such where Kaiba is holding someone’s baby.

Whenever he tries to give the baby back, it cries really shrilly, he continues to hold them

Some dipshit challenges him to a duel

Kaiba whisper scolds that the challenger to be quiet

“You picked the one time where I’m holding a baby to make your move? Cowardly, aren’t you?”

As usual, Kaiba duels anyway. Mokuba has the duel disk on his arm and holds the cards and Kaiba points to them to indicate where to place and calls his attacks ASMR style.

Kaiba glares at the challenger whenever he gets too loud lol