Snake Bitten {A Ninjago Au}

I could see now that the darkness had finally spread into Kai's heart.

"Kai...don't do this." I pleaded.

Kai slams me against the wall and puts his sword to my neck.

"You did this to me Lloyd! You ruined everything! But I could care less about what the others think of me anymore. Because the only thing I want is to take my revenge on all of you. Starting with you Lloyd."
--------
When Kai and Lloyd were training, Lloyd accidentally hits Kai's sword over the monastery wall. Kai jumps over the wall and finds his sword in the bushes but gets bitten by the same snake that turned Garmondon evil.

Kai knowing there isn't an antidote for this snake bite must try to hide this from the others. But how can he hide something that runs through his veins?