To triple a creature's power, that creature gets +X/+Y, where X is twice that creature's power and Y is twice that creature's toughness when Tifa's Limit Break resolves
There are also unique sets like the Challenge set for competitive events, and the D23 Collection set that were only available in one special collectors box set
It is very likely to have unique attribute and ability settings in the game, which are closely related to the themes and elements of the Moana movie
Im most inclined to suggest a Voltron playstyle for Kefka, since both halves benefit from combat buffs, but honestly, you can build any deck around him
4 Robin Hood - Sharpshooter 215/204, Ruby The festival theme of Disney Lorcana: Shimmering Skies is the perfect environment for Robin Hood to shine, as showing off archery tricks is what he does best