Alderon, The Dawnstar

Eminence: Whenever a creature enters
the battlefield under your control while Alderon
is in the command zone or on the battlefield, you
may pay {1}. If you do, the creature enters as an
enchantment along with its other types until
the end of your turn.
Constellation: Whenever an enchantment
enters the battlefield under your control, you
may cast a noncreature spell from your hand
without paying its mana cost.