It figures that in an article where we're probably going to talk about how we cheat these things into play, a way to cheat Draco in is printed right on the card
But the games you keep the crown for a turn cycle and plop Vorinclex, Voice of Hunger or some Eldrazi into play are even sweeter
Lapis Orb of Dragonkind enters the battlefield untapped, adds colored mana that has no restrictions on its use, and actively rewards you with a solid scry effect for casting Dragons or Changelings with it
You could give them genuinely useful things, double-sided effects which work the same regardless of who controls them, or any number of actively detrimental effects
As long as you can keep this for a couple of turns and you can draw into two or three more vampires, it should help you a lot
3 Herald Of Eternal Dawn Strictly Better Than: Platinum Angel Very similar in just about every aspect, Herald of Eternal Dawn and Platinum Angle share most of the same effects and abilities, with the Herald just barely taking the lead in terms of versatility