You imbue a whip you are holding with magical energy. As a part of this spell, the caster makes a melee spell attack with the whip; the whip’s reach extends to 20-foot, and you may use your spellcasting ability for the attack and damage rolls made with it.
 
On a successful attack against an object of 5 or less pounds that is not worn or carried, the whip wraps around the object, grabbing it and returning it to you. You must transfer the object to a free hand before the beginning of their next turn, or the object is dropped.

If you use the enchanted weapon to make an attack against a secure object that a whip could wrap around, the whip grasps it tightly and maintains its grip on that object for 1 minute or until you use a bonus action to yank it free. 

If you use this spell to attack an object that is worn or carried, the person wearing or carrying the object must make a strength saving throw against the caster’s spell save DC. On a failed save, the object is dropped, falling directly to the down from where it was held.

The spell allows you to make two melee spell attacks at 11th level.