Trench

2nd-level transmutation
Casting time: 1 action
Range: 30 feet
Target: --
Components: V, S
Duration: Instantaneous
Classes: Druid, Wizard
Subclasses:

Choose an area within range to excavate a trench that is 5 feet wide, 5 feet deep, and 30 feet long. When you create the trench, you can create a slope or stairs on either end for easy access. Anyone standing on the ground that is being excavated must succeed on a Dexterity saving throw or fall into the trench and land prone.