Surprise

Deals 1 D8 + dexterity modifier piercing damage
If you have advantage on your attack as a
result of being hidden, it deals an extra D8 of damage
Brittle Blade: If the blade is used outside of a
sneak attack, roll a D4. On a 1, it breaks, on
a 2, it is damaged - if used again for any attack after damaged have disadvantage on break roll.
The phrase "Surprise" is stamped on blade.