Comically the best draw spell for the deck is Lorien Revealed as it is really more of a land that supports you in all the right ways
Also, and this may seem odd given the importance of the card, 3 chateaus is unnecessary, given the ease with which you can search/recycle the card you can afford to drop at least one if not two copies to make room for some more traps either to help control the pace or to boost your combos (maybe an ultimate offering) I've always felt that one of the biggest strengths of the madolches is their search power and effortless redundancy, means you can get away with running fewer of your key cards and make room for more control cards and tech
Tolkiens work is incredibly clear and has a definitive shape language that is unmissable: youll know whose hand made it if you look at the work
YuGiOh Master Duel Eldlich Deck: What Cards Are Needed
And by how to obtain I assume youre asking how to obtain with prices as closest to MSRP as possible because if you dont care about costs it will eventually show up on eBay, and you just need to buy from there
The Power Nine Ancestral Recall, Black Lotus, Mox Emerald, Mox Jet, Mox Pearl, Mox Ruby, Mox Sapphire, Timetwister, and Time Walk make up the fabled Power 9: nine rare cards found in Alpha , Beta and Unlimited that are widely considered the most powerful ever printed