This makes this particular Gandalf, potentially, very expensive
The 30th and final card you'll have to find is the Shiny version of Mega Shine's animated 3-Star Mew card
There are ways to search it, so if you had a preference, you could put in the one copy, perhaps

3 Skull Servant 3 The Lady in Wight 3 King of the Skull Servants 3 Wightmare 3 Wightprince 3 Wightprincess 3 Mezuki 3 Uni-Zombie 3 Shiranui Solitaire 1 Shinraui Smith 1 Shiranui Spectralsword 2 Zombie Master 1 Doomking Balerdroch 3 Hel, Generaider Boss of Doom 3 Allure of Darkness 1 One for One 3 Burial from a Different Dimension 1 Foolish Burial 1 Monster Reborn 1 Harpies Feather Duster 2 That Grass Looks Greener 3 Generaider Stage 1 Zombie World 1 Card Destruction 1 Terraforming 1 Set Rotation 1 Metaverse 3 Generaider Battle 2 Shiranui Style Swallows Slash 3 Metal Martial Marcher 1 Shiranui Samuraisaga 1 Shiranui Shogunsaga 1 Shiranui Sunsaga 1 Shooting Riser Dragon 1 PSY-Framelord Omega 1 Crystron Quariongandrax 1 Crystal Wing Synchro Dragon 1 Gashadokuro, the Skeletal Mayakashi 2 Leviair, the Sea Dragon 1 Linkuriboh 1 Crystron Glassfiber 1 I:P Masquerena 1 Knightmare Unicorn Deck Commentary A Skull Servant Deck that uses Hel, Generaider Boss of Doom from Deck Build Pack: Mystic Fighters

However, you have to wait a turn after you play him to gain that benefit, so he pressures your opponent to remove him
If youre going first, youll probably want to set Dekoichi the Battlechanted Locomotive or summon Sangan, Mystic Tomato, or Reflect Bounder