I always wanted to say that...
Now, why do I wanted to stop the presses...?
Oh yeah, right! THIS:
After Jace, the Mind Sculptor, the first planeswalker with a 0 ability and a total of 4 abilities, we now have Sarkhan the Mad, a planeswalker that doesn't have a plus ability. The third turning point in the planeswalkers history (the first was elspeth, the first planeswalker with two plus abilities). So let's look at the crazyhead Sarkhan. He enters with 7 loyalty (and he can use his ultimate right away, wich is also new.) and he uses his Dark Confidant like ability for 0, although he takes the damage, not you. Then, he also works as a removal spell, although for a cost... He can force the sacrifice of a creature in exchange for a dragon. Well, that ugly indestructible 10/10 can transform into a neat 5/5 flying dragon... But i like to imagine your 0/1 plant from Khalni Garden transforming into a 5/5 flying dragon. Neat... His ultimate, wich he can use as it enters, is to blast away at your oponents life with the power of all his dragons. This seems nice, in two turns he can give 5 damage and stay at 1 loyalty. Well, the card itself isn't THAT amazing, but it's another improvement in the planeswalkers area. Kudos for the people at WotC!
So sit back, relax, and let me flay your mind.