Answer:
Slayer of regrets, old and new, sought by many, found by few.
I usually wear a yellow coat. I usually have a dark head. I make marks wherever I go.
What is full of holes, but can still hold a lot of water?
Pirates put their booty in it.
Ten men's strength, ten men's length. Ten men can't break it, yet a young boy walks off with it.
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?