Swarm of Jumping Spiders

You crush the dead Spider conjuring a swarm of jumping spiders that attack All hostile creatures within a 10ft Cube, you can as a bonus action on following turns move the cube up to 20ft in any direction provided it has a surface where the spiders can stand on.
All creatures attacked by the spiders must succeed in a dexterity Saving throw or take 2d6 piercing damage and become blinded until the end of their Next turn, half as much damage on a success and no additional effects.

At Higher Levels, When you cast this spell using a spell slot of 3rd level or higher, the area of the cube increases by 5ft and the damage increases by 1d6 for each slot level above 2nd.