mtg commander legends collector booster box Magic: the Gathering: one introduced in the set Commander Legends Collector Booster Box

To proliferate, you can choose any permanent that has a counter, including ones controlled by opponents

Cards like Play with Fire and Skewer the Critics see plenty of play in burn decks

And while there are some legendary creatures that can be alternatively cast for a non-creature half, that seems like a lot of hoops to jump through to then give all your creatures what you actually wanted two turns later

Here we have one of the flagship cards of the set (though it isn't actually a spacecraft)

The third issue is other players

That means in one round of turns, he'll be at 7 loyalty in your second turn and by your next turn you'll be at 11 enough to ultimate and keep him around