Ender Dragon, the Final Tyrant

Flying, Indestructible, Hexproof
When Ender Dragon, the Final Tyrant, enters the battlefield create 12 0/2 end crystal artifact creature tokens with defender, "when this creature dies deal damage equal to it's base toughness to target creature that damaged it this turn" and "this creature can be attacked as if it were a planeswalker"
If you do not control any end crystals Ender Dragon, the Final Tyrant loses Indestructible and hexproof
When Ender Dragon, the Final Tyrant dies, create a 0/1 egg creature