Honestly Pteramander is a lot worse here than you remember it being, as I think it is much harder to play Opt than it was previously, due to both the speed of Historic and the number of Curiosity effects you have straining your mana a bit more
While Court of Grace can be a strong inclusion in such a deck, there are potentially better options like Monarch cards in the form of Palace Jailer or cards that generate consistent token value like Elspeth, Sun's Champion, which may offer more immediate impact or flexibility
Gold Star Pokemon were always the rarest of the rare in the sets they were in, starting with their debut in Team Rocket Returns
Lumineon has the following attacks: Aqua Liner - 50 damageThis attack does 50 damage to 1 of your opponent's Benched Pokmon
Level is not part of a Pokmons name: GL Gengar, Gengar LV
And even if it's sent to his GY, it comes with a rock search bonus, and due to the relationship between your own resistance and the level that makes it difficult to use for Synchro, the opportunity to activate it will be limited to when it's destroyed in battle, but hopefully you have 3 cards in your hand