Dakthia, Draconic Refuge

{t}: Add {1} to your mana pool.
{1}, {t}: Add one mana of any color to your mana
pool. Spend this mana only to cast Dragon spells
or activate abilities of Dragons you control.
{3}{g}{g}{u}{u}{r}{r}, Sacrifice Dakthia, Draconic
Refuge: Search your library for a creature card,
reveal it, then put that card into your hand. If a
Dragon card was revealed this way, you gain 7
life.