Chandra Nalaar efects how to use it?

The first thing you need to make sure you understand is that she is not a creature. She is a Planeswalker. Secondly, she has three abilities available to her, each with a different cost. She comes into play with X counters on here, where X is equal to the number in the bottom right corner (I don't remember the number off the top of my head). These are called Loyalty counters. Each of her abilities costs a different amount of loyalty. If you have enough counters, you can play any of her abilities, but only one ability per turn. If at any point she has no loyalty counters, she is put into the Graveyard. She can lose loyalty counters by using abilities that remove those counters, or by being attacked by your opponents. When attacking, your opponent must specify if he wishes to attack you to reduce your life total, or if she wants to attack Chandra and reduce her loyalty. If he wishes to attack Chandra, blocking is done the same as it always is, and any damage not blocked is dealt to Chandra, and you must remove that many loyalty counters. You may not have two of the same Planeswalkers on the battlefield at one time. If you do, they both are put into the Graveyard.

everything this guy said is 100% true ^