When activated, you gain advantage (only) on your first attack action with a mele weapon.

If an enemy is killed with a melee weapon you have a minimum of 15 ft movement speed and you can attack with the same weapon another character as a free second action.

If the second enemy is killed from this attack, you gain a minimum of 15 ft movement speed and are capable of making another melee attack with same weapon.

Enemies can not make an opportunity attack when you are lincking your attacks.