An alternate win condition thats resilient but still leaves plenty of room for interaction is exactly what Id want from an effect like this
Its a very effective finisher, especially considering that most creatures large enough to station it ought to survive 4 damage
Not exactly game-breaking, nor stylish, nor even innovative
That said, Polygon did reach out to ask whether picking a booster pack matters, with the following response received: "While Pokmon Trading Card Game Pocket draws inspiration from the experience of opening physical Pokmon TCG booster packs, we are unable to share specifics at this time." So, essentially, they are unwilling to confirm or deny whether you're choice matters
All the characters that are mentioned and talked about in Ice Age , and one of the four legendary creatures we get is the Skeleton Ship
What you want is a trigger for whenever an artifact enters under your control, then incubate becomes a powerful trigger enabler