happy and all but

Ok now I need a spoiler...

I read the raws but I can't understand Korean...so if I understand the panel the mc kinda use a powerful skill(not sure) and passed out or died(not sure with the 'died')

I gtranslated aksjsjs :")
- yup! he used his special awakened skill (great sacrifice) when everyone was struggling. basically Jehee was trembling and literally begging him not to do it and Seonwoo 'died' in his arms. Taera's face calling 'Seonwoo hyung...seonwoo hyung' got me :(