Azor's Gateway - Sanctum of the Sun
Legendary Artifact - Legendary Land       (2)
1, [T]: Draw a card, then exile a card from your hand. If cards with five or more different converted mana costs are exiled with Azor's Gateway, you gain 5 life, untap Azor's Gateway, and transform it.
(Transforms from Azor's Gateway.)
[T]: Add X mana of any one color to your mana pool, where X is your life total.