You enchant one weapon with magical speed. The weapon has the following infusion options:

Weapon of Many Strikes. You can attack with this weapon twice, instead of once, whenever you take the Attack action on your turn. This ability does not stack with the extra attack feature.
Weapon of Sudden Strikes. Wielding this weapon, you can use a reaction to make an attack against any creature that attacks you. This attack is resolved before the triggering attack. You can use this ability once between short or long rests.
Weapon of Swift Strikes. This weapon has a number of charges equal to the creator’s Intelligence modifier. On each of your turns, you can expend a charge as a bonus action to make one attack with this weapon. This attack has advantage. The weapon regains these charges when you finish a long rest.