You play creatures that give benefits when they die, sacrifice them to outlets that provide even more benefits, and sit back as your opponents drown in a sea of value
Generally speaking, whoever plays their planeswalker first without letting it be countered will gain a significant advantage and usually win the game
The Murders at Karlov Manor Deep Clue Sea Commander Deck includes 1 Green-White-Blue deck of 100 Magic cards (2 Traditional Foil Legendary cards, 98 nonfoil cards), a 2-card Collector Booster Sample Pack (contains 1 Traditional Foil or Nonfoil alt-border card of rarity Rare or higher and 1 Traditional Foil Borderless Common or Uncommon card), 1 foil-etched Display Commander (a thick cardstock copy of the commander card with foil etched into the cards border and art), 10 double-sided tokens, 1 deck box (can hold 100 sleeved cards), 1 Life Wheel, 1 strategy insert, and 1 reference card.
Regardless of your cube design I think you can safely take it to 20% land count
If they play Commander, a commander precon deck is another strong choice
I really appreciate that Cid does good work, even from the graveyard, and the cycling for a colored two mana is a perfectly acceptable way to keep things going