Bone Zone

Choose a point within range, create a 20x20x20 cube made out of simple red outlines that flickers dangerously, all creatures in the area must make a dexterity saving throw of 13+your spell proficiency modifier, upon a fail they take 3D6+2 force damage, and gain 1D8 KR, at the start of their turn they turn 1D4 KR into force damage that they take, this goes untill they run out of KR, on a success they take no KR. The cube will stay in that spot for 2 rounds, before it disappears anybody who touches it, leaves its radius, or starts their turn in it's radius, takes 3D6+2 force damage and gains 1D8 KR

at higher level spell slots the KR gains another 1D8 and the damage gains a flat +1