Check surface, corners, edges, and centering
Sting is a great Flash artifact that is best played when your opponent's board is stacked with tapped creatures, but with a two-mana cost and a three-mana attach fee, it really could do with something else, like granting First Strike, to be a lock for competitive play
Even though this combo only involves two cards, you need to put in some work to make it tick
This zombie version of Xathrid Necromancer is a huge boon in just about any Zombie deck, passively generating an absurd amount of free tokens as you do regular zombie things like draw cards off Wilhelt, the Rotcleaver, tutor with Corpse Harvester, kill stuff with Ravenous Rotbelly, etc
if you do, Hermit Druid is an amazing combo-enabler
But beyond decks that want Devils or group-slug, its unlikely to see as much play as it maybe should