Crawling servants

You wave your hand over the ground and summon dozens of large centipedes from the earth. These centipedes obey your every command and can preform simple tasks suited for a few dozen insects.

Once on each of your turns as a bonus action, you can mentally command the group to preform one action. The group has a walking speed of 10 feet, and takes up a 2x2 circle on the ground. If an entity of adequate size and weight takes their turn to attack the group, the spell ends, and the surviving centipedes disengage, no longer under your command.

If a group of centipedes is ordered to attack, they quickly crawl up onto the enemy, occasionally biting. The centipedes do not have the strength to cause damage, but they are very distracting. The enemy has disadvantage on all actions, and must succeed a dexterity saving throw to shake the group off. If the enemy fails 2 saving throws, the enemy drops whatever it is holding and becomes frightened for the duration. (if the creature runs off with the group, you lose your centipedes).