So I have to step in here and try and prevent another senseless loss of ...okay its not that critical but honestly I am seeing grave diggers shovel all over the place and wondering to myself "why?"
Let's look at what it does piece by piece:
What it is: 2 cost, item, tool, melee, weapon. hand slot. A lot of cool tags to help it get into play, you can discount it, hold it in a bandolier, its also not too expensive so you don't really need to do much to get it into play.
What it gives you: +2 to combat for 1 damage fights, action and discard to get 1 clue these seem alright on paper, but remember this is tied to a hand slot, a hand slot that could have been a flashlight if core was all you had, and flashlight while providing no combat powers provides much more clue gathering ability at lower shrouds. If you are at the point where all that are left are high shroud locations and the only tool left is the shovel you are in for a world of hurt to win anyway.
The main issue I have is, even if this card is free to play, came into play fast it still isn't worth your time to use it, because the effects that brought it into play could have gotten anything else with the similarly wide net of traits. So really what this turns into is 2 resources, 2 actions, get 1 clue, maybe fight slightly higher between the two actions against odd health enemies. almost any other investigation card you can think of will outperform the shovel and now days we have Ice Pick, Mysterious Raven, Grete Wagner, faster effects that are just as guaranteed to work or remain as the shovel.
And for William Yorick the king of recursion, while the big Gravedigger's Shovel is a little fancy, Ancient Covenant+Favor of the Sun buries this card and breaks it down to salvage. If you really want to get clues at 0xp and your collection is limited: Lucky!, "Look what I found!" and Evidence! are all core set cards, if your team needs more than that there's Flashlight.
I can see it and its upgrades sleeker version being somewhat playable in a one handed melee weapon bruiser deck that had high enough combat to be using bruiser just for free money but what I have seen is decks running things like chainsaw and gravediggers shovel wondering to myself "how do they plan to use it?" "when do you get a chance to play it?" "where is the missing bandolier?" and "why?"