They copy themselves for each spell cast before it, so it's possible to cast enough spells to burn all your opponents with Grapeshot, or mill them all with Brain Freeze if you're able to cast a ton of spells in one turn (made easier with the Hullbreaker Horror combo)
Emblems are incredibly powerful in Magic: The Gathering , since there are no cards that interact with them , so you'll have this ability until the end of the game
For the first time, this set will be legal in the flagship competitive format known as Standard
Do it enough times and youll eventually have enough cards to tool around with making your own decks to try out in the games friendly mode, Quick Start
It has an incredibly thoughtful approach to the learning process out there
Its a very good card for you to play, though youll want 9+ Islands of course