Arcane Gravity

The weight of an object within range that you can see fluctuates wildly, making it difficult for a wielder to use. If cast on a weapon, the wielder has disadvantage on all attacks made with that weapon. If cast on medium or heavy armor, the wearer's movement speed is halved. If the object is no longer within your range at the end of one of your turns, the effect fades. 

You can cast the spell at a higher level, affecting an additional object for each spell level above 2nd.