Kaz can't heal himself anymore, so he's just taking all of these punches, sobbing
Kaz: N-no! No I-I can! But if you take him with us...I'll never be happy. I'll never be happy with you. So you have to let him go. I won't ask you for anything else ever again-just-just let him go...
(The bitch-honestly yeah...see I was like "Klaus is gonna bitch slap Kaz" and you were all "no, no of course not..." THIS IS SO MUCH WORSE THAN I COULD EVER HAVE F*CKING IMAGINED WHAT THE HELL!?)
Kaz: shouting in the hopes he'll get through to Sam a little SAM! I..I'M GOING TO FIND A WAY BACK TO YOU I PROMISE! I PROMISE I'LL FIGURE THIS OUT! I WON'T LET HIM HURT YOU!...I LOVE YOU!