okay so the strategy is pretty straight forward, the goal is to have a finish board of Buster dragon, Dragon destroyer and Vortex for negate.
easiest way to get there is:
either normal summon or special summon (using its effect) Darkwurm to bring Gate zero to your hand. ( if you use darkwurm as a discard for pendulum call, it’s an easy plus 2; bringing harmonizing and white wing to your hand).
If you still have a normal summon summon a level 4 or lower dragon monster. Buster welp’s effect adds destruction fusion to your hand. But if it dracoslayer that’s fine too. Link summon into Romulus, adding dragon ravine to your hand. Discard a card a send tempest to your graveyard (unless it break your scale)
use gate zero and any 8 scale apart from harmonizing magician for your pendulum scale. (harmonizing is to valuable when pendulum summoned but if it has to be done it has to be). Pendulum summon the harmonizing, darkwurm from your extra deck and dracoslayer if you have it, white wing magician if you have it and leave a zone open.
Upon pendulum summoning harmonizing special summon dragoncaller from you deck. And sychro summon Star eater. (Due to dragoncaller a effect if it attacks a dragon monster then it’s attack becomes 6400).
link summon Elpy and pisty using darkwurm and other level 4 or lower dragon monster. Special summon another darkwurm from your deck. Sychro Summon Buster dragon in defense using white wing and darkwurm. (This turns all opponents monster to dragons). Then special summon another dragon from your grave yard using pisty.
link summon skull dread using pisty, Elpy, Romulus and dragon to break guardragon lock. Drawing 4 cards, if you don’t already have destruction fusion in your hand then hopefully you draw it. If not add level 7 monster. (If you have another card in your hand so you can have a level 7 and destruction fusion then that’s the best) skull dreads effect to special summon level 7 and activate tempest effect banishing Elpy and pisty to special summon itself. Xyz summon odd-eyes absolute then link summon into galaxy satellite using absolute and skull dread. Which special summons odd-eyes vortex.
attack if you feel like.
if galaxy satellite is still on the field at the end of your opponents turn put buster blader or destruction fusion on top of your deck.
next turn is simple fusion summon dragon destroyer. Attack. ( if you are not going to end the duel by attack or it’s negated don’t worry) in main phase 2 pendulum summon any monster and link into protector welp, if you did not attack with dragon destroyer upon ending your turn protector welp then does damage to your opponent equal to dragon destroyers attack (which if there’s dragons on the field or graveyard then that’s quite a lot).
but that’s it, get your game on and high five the sky.