Maybe not now, but in a year or 2.
shovel1 should be buyable like tools in a shop. Its a normal tool.
shovel2 should everyone get a chance in the future from a questline as a reward. After it, it should be craftable like all other +2 tools too.
shovel3 should only be craftable after a long questline as a reward like the 3k gears-questline.
shovel4 - at the moment not able to get - in 1 or 2 years as a drop from scorpion.
Drops from graves should be random, but not higher than 1k++ item. Only in the room at the end of that Maze-Event it should get a chance to get such a 2k item as reward. That makes the chance more fair vs such players who doing daily quests or altar every day.
That is only my idea behind that shovel.
THE SHOVEL IS A NICE NEW IDEA that makes this game more fun to hunt for free graves

Good luck on hunting graves

SK