Building the deck as somewhat of a Voltron Equipment deck is the name of the game, because to get the most out of spending big on equipment, you will want to be using them in the best possible ways
Auras tend to be cheaper than equipment with similar abilities, because your opponent can use a single removal spell to destroy a creature and every aura attached to it
Furthermore, its monster effect is similar, as it can special summon a Lunalight monster from the GY when it is destroyed by battle or card effect
The Ur-Dragon reduces the cost of your Dragons, allowing you to deploy massive flying threats ahead of schedule and overwhelm opponents with relentless pressure
Prioritize cards that have these abilities to keep your opponent guessing your next move throughout the game
Also, if you happen to be in the Seattle or Portland areas, you could just go into the shop and pick it up directly