Plus, youre always free to choose an opponent with no graveyard, which will be pretty feasible in the early turns (when Skullwinder can give you back a ramp spell or a used fetchland)
If you want to make things easy, build a deck that includes Gastly, Haunter, and Gengar
It's also a part of a fan-favorite Archetype, making the rarer Cyber Dragon cards much more highly sought after
But throw in Dross Scorpion to the mix and we can now untap the Throne each time we activate it, meaning infinite proliferate
Then its Max Burst attack (costing 1 Fire and 1 Lightning Energy to play) deals 20 HP damage, plus an extra 80 HP of damage for every Fire and/or Lightning Energy you discard from the Rayquaza VMAX itself, which can be devastating when timed correctly
It's at sorcery speed which is a bit of a bummer, but it's still incredibly efficient at any point in the game