Thinkgood's Conjure Kobolds

You call forth a pack of kobold spirits to assist you and hinder your foes. The kobolds appear in a 20-foot-radius sphere at a point you can see within range.

When you cast the spell, you designate any number of creatures you can see to be unaffected by it. While in the area, an affected creature's speed is halved and they have disadvantage on dexterity saving throws. You and your allies have advantage on all attack rolls made against affected creatures while they remain in the area. On subsequent turns you can move the pack up to 20 feet as a bonus action.