If he is exerted, your opponents character must challenge him (not your other characters) if they choose to challenge a character
Arthur - King Victorious steps up to the task admirably, depicting Arthur as seen in The Sword in the Stone with a scroll in one hand and the gleaming sword in the other
With this in mind, Emerald decks may want to look at Undermine as a pretty good two-for-one special
Now normally I would rather have the effect on ETB, but since Snow White can shift onto the board and quest immediately, it's almost like having it as an ETB effect AND having the ability to trigger it again and again each turn
The D23 Collection was a limited-run set with the first six cards using the D23 set ID
These effects, along with the art, bring to mind something like the Star Destroyers in Star Wars , fitting the nature and theme of the expansion