Dragon deck what should i put?

A good card you could get which would make your dragons almost unbeatable is "King Dragun" (Fusion of "Lord of D." and "Divine Dragon Ragnarok.) This card keeps your opponents from affecting any Dragons on the field with a Spell Trap or Monster Effect. Meaning your dragons will on be destroyed as a result of battle - including "King Dragun" - as longs as it's on the field. And as a bonus, you'll be able to special summon a Dragon type monster per turn. And Dark Paladin would be a good one two, he's not a dragon, but he'll sure benefit from your Dragons.