By playing with decks built by other people, you'll start seeing the logic behind the deck
Any "as [this creature] enters" or "[this creature] enters with" abilities of the chosen creature will also work
For competitive tournament prep, proxies make it easier to test various cards without buying them first
There are two strikes against this deck in a format like that: In Best-of-Three, even if you win Game One, the opponent will have the opportunity to bring in all their instant speed removal for the sideboard games
The practical takeaway sits one tier down: the affordable cards, like modern chase cards, tend to be cheapest and most available in Japan, the very market that produced the grails in the first place
Covering Japanese Base Set (in Japan known as which translates literally to expansion pack) right the way up to the Legendary Collection reprint set