Bleed into Shadow

2nd-level Transmutation
Casting Time: 1 action
Range: Self
Components: V, S
Duration: Concentration, up to 1 minute
Merge with your own blood, cloaking yourself in a shadowy, fluid form. The spell ends if the creature drops to 0 hit points. While in this form, your movement speed becomes 15 feet and you gain resistance to nonmagical slashing, piercing, and bludgeoning damage. You can move through spaces as narrow as 1 inch without squeezing, and you can pass through small holes, narrow openings, and even mere cracks. However, you can't manipulate objects, and you can't attack.
At Higher Levels: When you cast this spell using a spell slot of 3rd level the duration increases to 10 minutes, when you cast this spell using a spell slot of 4th level or higher the duration increases to 1hour.