Player's Handbook (2014) - Modified
2-level Conjuration
You fill the air with spinning daggers in a cube 5 feet on each side, centered on a point you choose within range. Each creature in that area takes 4d4 slashing damage. A creature also takes this damage if it enters the cube or ends its turn there or if the cube moves into its space. A creature takes this damage only once per turn.
On your later turns, you can take an action to teleport the cube up to 30 feet.
When you cast this spell using a spell slot of 3rd level or higher, the damage increases by 2d4 for each slot level above 2nd.