Muckraker From the Underworld is another card you can play, but it would be only be there in instances where you could make it later on into the game as you functionally just want to focus mainly on Lady of Lament plays early on
Shiny Treasure ex set hints at potential features in English-language adaptations
Jecht also pairs well with cards that can jump over blockers like Dragoon's Lance and Summon: Primal Garuda
Latias is my favourite legendary and it's probably due to the Pokemon movie it featured in
It's the home of the most valuable Sword and Shield era chase cards for the most part, including Moonbreon, Rayquazza VMAX Alt Art, Umbreon V Alt Art, Dragonite V Alt Art, most of the Eeveelution VMAX Alt Arts and the stunning Rayquaza V Alt full art
Others have to use tricks like casting Deep Analysis to force you to draw cards and would otherwise have no game at all