The Regent Queen Egraxa

Flying, Hexproof, Indestructible
The Regent Queen Egraxa can't be placed on the battlefield by spells or abilities
All Dragons you control have protection from everything and "{t}: Add {5} to your mana pool."
{w}{u}{b}{r}{g}, {x}, {t}: Create 2 X/X Alpha Dragons
with Flying, Hexproof, and Indestructible