The fastest option with the least effort is Card Conduit or selling directly to your LGS
You potentially can also use the front side of Invasion of Shandalar to return massive finishers like Portal to Phyrexia or Atraxa to your hand, flip Invasion of Shandalar, and drop them into play on future turns, which sounds powerful if you can find the time to get it set up
Sometimes the cards you draw just dont allow for that, however, so attrition is also a perfectly viable backup plan
While Scryfall doesnt really have a community function like Gatherer did, it does collaborate with EDHRec so you can sort results based on EDHRec popularity
4 Divine Arsenal AA-ZEUS - Sky Thunder (Quarter Century Secret Rare): $137.26 One of the best Xyz monsters ever printed is Divine Arsenal AA-ZEUS - Sky Thunder
But it also handles auras and counters: They all fall off