Event Shop Tickets are used to buy cosmetics and special event-related items from the store
Since you'll be casting Dragons repeatedly, the best kinds for a deck like this are ones with powerful enter the battlefield effects, like Thunder Dragon
If I was to play a major event though, I think the three/one split would be better, as some decks cannot beat the Angel in game one, but I would play the fourth Archon in the sideboard
The worst grade you can get for centering is a 4 but if the card exhibits the features of a higher grader except centering, you'll have the chance at a grade 9 with the OC (Off-center) qualifier
It seems last time Pokmon Happy Meals were available, in early 2021, they were not an unqualified success - with scalpers turning up to snatch box after box, leading to limited supply
The Ur-Dragons eminence ability is a passive ability word that works from either the battlefield or while your commander is in the Command Zone