It is rare that they are an awful inclusion in any deck, they rarely are the reason you lose a game which cannot be said for a lot of cards such a the humble comes into play tapped lands
Fortunately, there are hundreds of them, so finding enough to play even in a singleton format such as Commander won't prove too difficult
1 Sting, the Glinting Dagger
Whenever a creature an opponent controls becomes the target of a spell or ability you control, put a bounty counter on that creature
Goldeens serene, aquatic Pitch Black IR is the glamorous Water-type Pokmons first spotlight of this nature, making it an incredibly exciting and long overdue addition to the set
Honorable Mention One card that almost made the cut was Saheeli, Radiant Creator from Aetherdrift Commander