This is an Avacyn Restored Cavern of Souls painted with Golden Fluid Acrylics to have the Old School Magic frame.
This type of alter is technically not tournament legal according to MTR 3.3. This is because the name of the card is altered. The frame sizes of the new and old border are different and do not line up correctly, so the name has to repainted on. However, most judges should allow the alter because the artwork is not changed at all.
*Always ask the Head Judge before using any alter in tournament play.