While card selection and card advantage are two very similar concepts, theyre strictly different when it comes to the outcome
Whenever this creature deals combat damage to a player, that player sacrifices a creature of their choice.
Then, we multiply the odds of opening a card by the card's value, which tells us how much value we expect that card to add to the box
If there is no power and toughness indicated, it simply means the Spacecraft will have the abilities listed in that part of the text box, but it won't become an artifact creature
Its still a pretty potent deck, and with a few upgrades, it can become an absolute beast, but as it comes, it struggles to compete with the other options from Lost Caverns of Ixalan
All that being said, this is certainly a prospected card that may or may not ultimately make the cut