Gravedigger's Shovel

The Gravedigger's Shovel is a tool that can be used to dig up Tombstones on soft ground more quickly and can only be crafted at an anvil whilst placed in a graveyard mini biome. It mines a larger area than a pickaxe (3x3 blocks from cursor).

Its best modifier is Legendary. While Light may seem to provide a better speed boost by percentages, rounding reveals Legendary and Light mine at equal speeds.

Trivia

 * The tooltip may also be referencing, which features 'Can you dig it?' as a prominent quote.