Bone away

Strengthened by the shadows, you break away from the fight with a 30 feet leap backwards. As you leap, you leave a trail of bones which grow into bigger spikes, that deal 1d6 piercing plus 2 necrotic damage to creatures that step on them. Enemies don't get an attack of opportunity if you leave their melee range.

This spell's damage increases by 1d6 when you reach 5th level (2d6), 11th level (3d6) and 17th level (4d6).