If the plotted card has any mandatory additional costs, those must still be paid to cast the spell
It works slightly better than that, too, as your opponent is going to need to deal with it if they want to live, which means that a recursion ability doesnt go amiss at all
Should your card achieve an Imperium 10 you will be able to opt in to upgrade your label to our red holofoil label that is only reserved for cards that reach top marks
You can stop whatever you need to with this, but your opponent could end up better off for it just like with Chaos Warp and Wild Magic Surge
That's not going to come until much later in the Lorwyn block, but I am quite surprised to see a representative this early in the game's life
if a card is graded a 10 and every other card is only a 9, suddenly you're the one carrying the only graded-10 Pokemon card that all collectors want