Everything is from Khans of Tarkir block.
There is no 5-color identity Legendary Creature from Khans of Tarkir block, so I punted and use Shaman of Forgotten Ways.
If someone ever were to balk at it (no one ever does), I would go off-theme and use Sliver Queen.
Click here for a text version of this decklist
Click here for my EDH Commander decks