Quagmire

You convert an area of 5 - 20 ft ( Depends on what you want to cast on) in to a swamp like liquid. Should any creature step into this they would become slowed and find it very difficult to move. It lasts for 2 minutes but can be dispelled before the duration is complete.  Roll a d8 to determine the effect, a 1 or 2 is a fail and would fail, backfiring on the user making them or one of their allies caught in the quagmire. Should you succeed the opponent would have to roll a dex save.

At higher levels, the spell would scale by spell level and the maximum area that you can convert into a quagmire would increase by 20 until capping at 100.