this could be from cards like Toothy, Imaginary Friend and Kianne, Corrupted Memory that grow whenever you draw cards or from those like Psychosis Crawler and Tishana, Voice of Thunder whose power and toughness are equal to the number of cards in your hand
If you are deciding what to discard with Faithless Looting, generally the big creatures are the most obvious choice unless its post-board and you want to hold them either for Show and Tell or not wanting to expose it to a card like Soul-Guide Lantern
Unopened Pokmon First Edition Base Set Booster Box Sells for Whopping $408,000 USD at Heritage Auctions Breaking Heritage Auctions previous world record sale that sold a similar booster box in November 2020 for $360K USD
March of Burgeoning Life March of Burgeoning Life is a ton of fun for combo decks that need two copies of the same effect to go off
Unesh, Criosphinx Sovereign But if the cost reduction still isn't enough for you, Unesh also provides pseudo-Fact or Fiction triggers, completely free of charge