Most black instant cards are removal spells, so they pair nicely with cards that care about creatures dying like Blood Artist, Falkenrath Noble, and The Meathook Massacre

Sort Card Type Dark Quilava #39Uncommon $4.90 Ethan's Quilava #33Common $0.16 Ethan's Quilava #33Common $0.20 Ethan's Quilava #16Common $0.11 Quilava #24Uncommon $0.17 Quilava #91Uncommon $8.73 Quilava #51Uncommon $5.68 Quilava #51Uncommon $5.42 Quilava #45Uncommon $1.70 Quilava #60Uncommon $1.22 Quilava #49Uncommon $1.91 Quilava #49Uncommon $0.96 Quilava #19Uncommon $0.37 Quilava #41Uncommon $0.43 Quilava #10Common $0.29 Quilava #18Common $1.16 Quilava #10Common $2.44 Quilava - 2011 (Christopher Kan) #49Uncommon $13.25 Quilava (46) #46Uncommon $3.62 Quilava (47) #47Uncommon $4.59 Quilava (Delta Species) #36Uncommon $3.50 Quilava - 2011 (Christopher Kan) #49Uncommon $13.25 Quilava #91Uncommon $8.73 Quilava #51Uncommon $5.68 Quilava #51Uncommon $5.42 Dark Quilava #39Uncommon $4.90 Quilava (47) #47Uncommon $4.59 Quilava (46) #46Uncommon $3.62 Quilava (Delta Species) #36Uncommon $3.50 Quilava #10Common $2.44 Quilava #49Uncommon $1.91

This card will for sure be played in Humans, since you can fetch it with Imperial Recruiter and in Yawgmoth Combo, replacing Reclamation Sage
The Branded deck is uniquely capable of finding ways to special summon Gimmick Puppet Nightmare to their opponent's side of the field, effectively locking them out of playing the game for a turn
Now, I think its a pretty good opinion, as indicated by my spending at least two thousand words on it and counting