Most of the legends matter stuff is on a handful of underperforming rares though (i.e., Clive's Hideaway, Serah Farron), so dont expect to build around legends specifically
Disney Lorcana: The First Chapter releases in Booster Boxes (which contain 24 packs), Illumineer Trove (8 packs) and Starter Decks (1 pack)
The concept alone sells it -- a Transform Pokemon rendered in that signature purple blob form, ready to become anything on the field
If unanswered, it accelerates your game plan while it disrupts opponents, which is why it remains a staple threat across multiple competitive formats
Sometimes you wont have Lathril in play, or a way to overrun with your creatures, but you will have enough power on the board to kill a player, thanks to the various buffs from your lords and the sheer number of elves in play