This effect would already be great, but Plasma Caster gives a small stat-boost as well and hardly costs any mana
2 Mana 5/5 Flying Scry every time a creature you control dies
Adding black to a mono-blue deck isn't something crazy and new
The "Other" category encompasses a diverse mix of archetypes, including Mono-Black Conqueror, Boros Enchantments, Naya Burn, Esper Reanimator, Selesnya Tokens, Orzhov Midrange, Golgari Midrange, Mono-Black Demons, Dimir Reanimator, Orzhov Lifegain, Five-Color Legends, Mono-Green Aggro, Surprise Ramp, Rakdos Sacrifice, Boros Tokens, Mardu Pact, Jund Demons, Mono-White Angels, Mono-Blue Tempo, and many others
While it hasnt seen the explosive growth of the Charizard line, its $30 price point is incredibly stable, making it a safe diversification pick for those who appreciate the art gallery side of the hobby
They're the Clam Creole Jazz Kings, apparently, and the effect is fun, where the player that summons Clam Session chooses a word, forcing everyone to sing a song with that word in it