It has a triggered ability that means, whenever one of your dragons attacks, it deals two damage to any target
And Dihada is one of the few Planeswalkers that can lead from your command zone, where it is one of the best Mardu commanders
You can pull off a turn two win with a Mox, a Gitaxian Probe and a very lucky Consultation
Sometimes they are worth quite a little
In the article announcing the banning, Wizards suggested that it was willing to see if players would tolerate a "skill-testing, one-deck metagame." As such, it seems that a deck being 75% of the format doesn't automatically necessitate a banning
I have talked about time and time again about how getting mana for free is one of the best things you can do because it gives you such a huge advantage over your opponents