It increases its power with cards dropped from the seal and breaks a large number of shields, which increases the number of cards you can look at with the commander bonus, helping you find the cards you want
I have played Modern a total of maybe four times, and I have sold most of my collection outside of my old school cards, but I figured I should be able to build a half-decent Urzatron deck (which may still be all, or at least some of all the rage in Modern)
Heres how it technically works: You cast an instant/sorcery with in its cost, lets say Banefire
We also get representation for every member of Team Avatar besides the lovable bald boy himself, with cards with Toph, Sokka, Zuko, Katara, Momo, and Appa
Goblin Sharpshooter works great in all sorts of decks, not just goblins
Wins arent impossible with this particular Starter Deck and there is definite value here for players looking to play any combination of Sapphire deck