A good large creature armed with the Cloak will dominate the game
I may be a little biased because I'm a huge Tolkien fan, an Avatar nerd, and I love me an RPG, so Universes Beyond sets definitely excite me
The value of X is calculated only once, as Siegfried's last ability resolves
This meant that the downside of not being able to spend mana to cast Hogaak didnt prove to be much of a downside, and Hogaak was quite easy to cast as early as turn two, even in Modern
If the copied creature is a token, Kimahri copies the original characteristics of that token as stated by the effect that created the token, with the listed exceptions
That is what Set Boosters are