The Butcher (D&D)

Dual Blades (The wielder can use a bonus action to
separate the two blades into two individual weapons,
or join them together. The Butcher does 1d10 slashing
damage when joined, and each blade does 1d8 slashing
damage when separated.)
Blood Craving (On a hit and when the two blades
are joined, the target must make a Constitution
saving throw against the wielder's strength;
DC = 8 + STR Mod + Proficiency Bonus.
A failed save inflicts bleeding on the target, and they
take 1d4 slashing