Combine the two abilities with some effect that will let you make mana like Ashnods Altar and Pitiless Plunderer, which will net you six mana when you sacrifice them all between the Altar and Treasure tokens
If The Toymaker's Trap leaves the battlefield and later returns to the battlefield, it has no memory of which numbers were chosen for its effect before
Of course, the most expensive ever was The One Ring which sold for a whopping two million dollars
Admittedly, I haven't had much time to experience what spacecrafts have to offer in terms of raw gameplay, but I do know that the abilities this one provides are excellent
Throughout the years playing with her, I opted for a different path: I always added creatures that are more defensive, and offered some type of protection or advantage, and that disrupted the opponents in some way