Ren is haunted by the deaths of his party members in a failed attempt to defeat the Spirit Tortoise, and doesn't want to believe that he might be responsible for what happened.  Myne seems ready to take his side and support him, but...
I'll kill you.
سوف أقتلكم
Ich werde euch töten.
Los mataré.
Os mataré.
Je vais vous tuer.
Vi ammazzo.
Vou te matar.
Я убью вас.