Importantly, Prototype creatures are only considered to have their Prototype cost when on the battlefield or on the stack
This Duskmourn: House of Horror Endless Punishment Commander Deck includes 1 deck of 100 Magic cards (98 nonfoil cards and 2 Traditional Foil Borderless Legendary cards), 10 Archenemy 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 Uncommon card), 10 double-sided tokens, 1 deck box (can hold 100 sleeved cards), 1 Life Wheel, 1 strategy insert, and 1 reference card
Card x1 128+1 card types 24 booster packs per box (12 cards per pack)
One example is the card called Slippery Bogle, a creature with Shroud and Hexproof
You can also see a lot of DLC packs, all of which are to be used within Legacy of the Duelist