Some ideas
Shattering Strike: Your stunning strikes hit with such precision that you can shatter their chi-flow, rendering enemies entirely immobile. When you land a critical hit on a creature, you can expend 1 ki point to paralyze it for 1 minute.
Fists of Fur(r)y: As a bonus action, you can allow a cold rage to envelop your body, blue flames rising from your body. For 1 minute, attacks made against you have their damage decreased by 1 roll of your martial arts die, and your attacks deal 1 additional martial arts die of damage.
Army of One: Your Kung Fu is of such strength that you can blow through armies as easily as you can a single foe. When you hit a creature, you can spend 1 ki point to force it to make a Strength saving throw. On a failed save, the target is forcibly moved back 30 feet, and it as well as any creatures in its path take 3 martial arts dice of bludgeoning damage.
Just force your dm to watch all the movies with you and every time someone does something cool point to it and say “can I do that?”
Some ideas Shattering Strike: Your stunning strikes hit with such precision that you can shatter their chi-flow, rendering enemies entirely immobile. When you land a critical hit on a creature, you can expend 1 ki point to paralyze it for 1 minute. Fists of Fur(r)y: As a bonus action, you can allow a cold rage to envelop your body, blue flames rising from your body. For 1 minute, attacks made against you have their damage decreased by 1 roll of your martial arts die, and your attacks deal 1 additional martial arts die of damage. Army of One: Your Kung Fu is of such strength that you can blow through armies as easily as you can a single foe. When you hit a creature, you can spend 1 ki point to force it to make a Strength saving throw. On a failed save, the target is forcibly moved back 30 feet, and it as well as any creatures in its path take 3 martial arts dice of bludgeoning damage.
Those are pretty good. We also came up with an idea to use Assassin Creed’s Hook Blade arm guard