If you make sure all your cards that cost 3 or less are legendary, when you activate Plargg, the only two targets are two cards you have chosen for the combo: Shifting Shadow and Shielded by Faith
you can open any two Jumpstart Booster packs, regardless of what set theyre from, then shuffle the cards from each pack together and you have a deck ready to go
But as is, if you have the mana, Legacy Weapon is the answer
Were also not going to count serialized cards, since they are intentionally printed at a limited number and can skew the top end of the game to just a bunch of serialized cards, and thats not fun
We have a variety of ways to keep triggering Kardur: the most common is by making token copies of Kardur with cards like Jaxis, the Troublemaker and Orthion, Hero of Lavabrink which trigger his mega goad before dying, but we also have bounce with Skull Collector and reanimate/blink with Rescue from the Underworld