"Discover," as it's helpfully called, is a lot like Cascade--it lets you dig through your deck to play cards that you'd otherwise have to wait for
P/T Number 0 Language English Legal Formats Commander, Legacy, Modern, Vintage Not Legal Formats Alchemy, Brawl, Competitive Brawl, Historic, Pauper, Pioneer, Standard, Timeless Rulings (10/4/2004) The ability destroys the creature at the end of the combat, which is after all first strike and normal damage dealing is done
Still, its best to leave it in your Limited decks, where it's obviously very good
Although I do think understanding the different types of Pokmon cards is the first step toward building a winning strategy
Its neither optimized nor mind-blowingly powerful, but its also one of the decks Ive enjoyed piloting the most in my Magic career