Droga, of Infinite Skies

Eminence – As long as Droga, of Infinite Skies is in the command zone or on the battlefield,
whenever you cast a Dragon spell, you may search your library for a land card and put it onto the battlefield.

Flying
Celestial Growth – You may tap an untapped Dragon you control to add one mana of any color, which is that Dragon's color identity.
Dragon's Call – {t}: Sacrifice a Dragon. Search your library for a Dragon card with converted mana cost equal to or less than the sacrificed Dragon's power,