Let's say Phoebe steals the text boxes of both Beast of Burden (power and toughness equal to the number of creatures on the battlefield) and Psychosis Crawler (power and toughness equal to the number of cards in your hand)
Convert to Slime gives you a three for one, and if you have Delirium, you get a fonky chonky Ooze for your troubles, making it a four for one, for five mana
Its often the ultimate companion piece for plenty of outstanding partner commanders who can draw into it or cheat it out, and is essentially the final boss of blue magic that can turn every card in your hand into an unstoppable threat
Neither Amass Orcs nor The Ring Tempts You are really a focus in this deck list, although both are certainly present to lend some Tolkien-specific vibes
Lastly, cards like Bident of Thassa trigger from combat damage to players, and a flyer deck has a good shot of getting something through unblocked, even if its small