Create pit

Creates a 5ft radius, extradimensional hole in the ground that is 10ft deep, centered on a point you can see within range. Any creature who’s space is completely within the area of the pit must make a Dexterity saving throw, or fall into the pit, taking fall damage and falling prone as normal.  If the pit has the same area as the creature’s space, it makes the save with advantage, and creatures whose space is larger than the area of the spell make their save automatically.  Creatures that are not on the ground (creatures that are flying or hovering) are unaffected.  A creature that makes the save is pushed harmlessly to the edge of the pit.  

The walls of the pit are rough stone and easily climbable, a creature without a climb speed must use 2ft of movement for every 1ft climbed, as normal, and does not need to make a skill check to escape the pit.  When the spell ends, any creature within the pit is harmlessly ejected from the pit.  

The pit is extradimensional, and does not displace the material beneath it.  If there is not enough space for the radius of the pit, the spell fails.

This spell can be cast using a higher level spell slot, increasing the depth or radius (caster’s choice) by 5ft for each level above 1st.  Different options become available at certain levels:

3rd level: Spike Pit  The walls and floor of the pit are covered in spikes, dealing 2d4 damage to each creature for each 5ft of movement through them.

5th level: acid pit  The bottom of the pit is filled with a few inches of acid. At the start of each of its turns, the acid deals 1d6 damage to the creature, and everything it is wearing and carrying. Once out of the acid, the effected creature or another creature must use an action to scrape off the acid to end the effect.

7th level: hungry pit  The caster can use an action on subsequent turns to cause the pit to momentarily slam shut, dealing 4d10 bludgeoning damage to each creature in the pit, and force them to make a strength saving throw, falling back to the bottom of the pit on a failed save. This option halves the depth of the pit.

9th level: Multi-Effect  Choose two of these options.