Orb of Dragonkind

“1, T: Add two mana in any combination of colors. Spend this mana only to cast Dragon spells or activate abilities of Dragons. <br>R, T, Sacrifice Orb of Dragonkind: Look at the top seven cards of your library. You may reveal a Dragon card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.”