It seems appropriate to me to dig a little deeper into these decks and offer some cards that have a little less broad appeal for Cube, but that will fit some specific Cubes very well
GET ALL 4 DUSKMOURN: HOUSE OF HORROR COMMANDER DECKSSee the future and cast miracles with Miracle Worker, fill your graveyard and reanimate monsters with Death Toll, cast tricky instants and mysterious face-down cards with Jump Scare!, or control monstrosities and make your opponents pay with Endless Punishment FOIL BORDERLESS COMMANDERSEvery Duskmourn: House of Horror Commander Deck includes 2 Traditional Foil Legendary Creature cards featuring spine-tingling Borderless art INTRODUCING 40 COMMANDER CARDSEach deck introduces fresh horrors to Magic: The Gathering with 10 never-before-seen Commander cards 40 ARCHENEMY SCHEMESArchenemy pits a team of three against one player who draws from an extra deck of powerful and nefarious schemes

Honorable Mention - Sliver Overlord, Sliver Hivelord, Sliver Queen, Sliver Legion Because they are the one tribal deck that plays so similarly, has the same slate of Slivers each time, and very similar support for them, I find this combo to be very boring, pervasive, and more
I think he's decent
Unlike some other cards, it doesn't have to be exerted, so you're giving yourself an extra ink and card draw on your turn
Asari Captain A 4/3 with haste that can attack as a beefier creature is a good source of damage, and you can attack with a lesser samurai or warrior if you dont want to lose Asari Captain