Darius's first experience with any weapon was against Cyrus with wooden training swords when he was 9-ish. He was, expectedly, outmatched and got knocked onto his ass.

As Darius was getting back up, Cyrus decided he was gonna take his training sword and hit his little brother in the head as hard as he could.

Split Darius's scalp open, blood everywhere, lots of yelling, got in trouble. Typical Cyrus.

Darius still has the scar on his scalp.