Note that the image below comes from this Korean blog, but was originally found on the Korean Pokemon TCG website
You can't do so later in combat, and creatures put onto the battlefield attacking can't be exerted
This effect might not be as good in two-player formats, but in Commander the power of politics makes this an extremely useful tool provided you know when to use it
Astral calls her Dueling style very reckless (using up her entire hand in the second turn) but also very calculated (being able to push her opponent in a corner in only the third turn), which coincides with her personality
Additionally, for cards that have diamond rarities, you need to unlock the initial Flair before you can make the last ones, whereas you can unlock any Flair for cards with star rarities
For Seto Kaiba, strength always does good, so this Deck is packed with powerful monsters and destructive Spell and Trap Cards