Unearth

When you cast this spell, any bones or corpses within the range will slowly rise to the surface.  

The spell can penetrate most barriers (including wooden coffins), but it is blocked by 1 foot of stone or 1 inch of metal.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the area of effect increases by 10 feet for each slot level above 1st.