Hordebreaker

Source: Homebrew - https://goo.gl/W6w4yM

any Two-Handed weapon, usually Greatsword

This weapon counts as a +1 of its type. When making an attack with this weapon, the wielder may choose to attack two creatures in range instead of one by splitting the weapon into two one-handed versions as a free action. Roll an attack against both creatures. If either creature is hit, they take half damage, rounded down. If both creatures are at least one size category smaller than the wielder, they take full damage instead. This weapon can not be used to make an off-hand attack while split in two.

This ornate greatsword pulls apart into two smaller blades, bound to each other by magic. When pulled into two, the smaller blades seem to pull towards smaller creatures with great accuracy and precision.