ReZero Starting Life In Another World Light Novel Vol 6

Description

How do you repay someone who saved your life when all you can do is die?
After suffering terribly at the hands of the Archbishop of Sloth Petelgeuse, Subaru has returned once more to the capital with his ability, Return by Death. Swearing revenge, he'll need to find allies and borrow their strength to strike back the the Witch's Cult and save Emilia. But how will he manage that when he has nothing to offer, powerless as he is...?