Cactus Uppercut

You conjure a cactus which shoots out from a 5 ft. surface (wall or ground) within range. All creatures within 5 feet of this surface must make a dexterity saving throw. On a failed save the creature takes 3d4 piercing damage, or half as much on a successful one. 

A creature which fails the save is also shoved 10 feet in the opposite direction of the surface. If it is flung in the air by this effect it also takes 1d6 bludgeoning damage if it hits some form of ceiling.

The cactus withers away after dealing damage.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, you conjure one additional cacti for each slot above 2nd