Tiamat Reforged

+2: Search your library for a dragon card with mana value less than or equal to the amount of loyalty counters on Tiamat, and put it in your hand.
-X: Roll a D(X) {X has to be 4 or less). If you roll a 1, you gain 2 life. And so on for a 4/4 dragon with flying, 10 life, and 15 treasure tokens.
-15: Search your library for 15 creatures, 10 basic lands, 5 instant or sorcery cards, and 3 auras/enchantments and put them onto the battlefield.