With Power Blackjack, you are dealt two cards face up, and the dealer has one card up and one card down. When it's your turn, you can hit stay and double like normal. But if you have a total of 15 or 16, you can choose to power split them.
While luck certainly does have a part to play in Blackjack, there is a lot of skill that goes into playing the game. How much skill or strategy you use depends on the time and effort you are willing to put into learning these skills. One such skill is card counting-not like by casinos but certainly not illegal.