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Since the trigger is "when Special Summoned" instead of X summoning, it is also strong that you can use it any number of times if you revive from GY
And, at least from my reading of the explanation, it has the capacity to offer a much more varied suite of decks for players to try their hand at offering "dozens of games straight from the box." In a nutshell, WOTC wants to give new players an onramp to MTG from the "I am interested in Magic, but I dont know anything." stage all the way to the "Oh, Ive identified what I like to do, and Im going to do more of that." stage
You may play 1 Tamer card among them without paying the cost
, players can try to plan out a good sequence of cards to lead to victory, but unless otherwise stated by a card's effect, they won't really know what their opponent has up their sleeve, which can make plans fall apart
When the spell resolves, it enters the battlefield with the same characteristics the spell had