Several possibilities: 1. Butterflies. 2. Pickles. 3. Raspberries. 4. Smaller balls, each full of smaller balls, each full of smaller balls, each full of... 5. Hive. It's actually in the same fleet as Oryx's dreadnought. 6. Cream cheese. 7. White mice. It's the universe's largest mouse maze. Or if you prefer, a playground for hyperintelligent pandimensional beings. 8. Adolf Hitler clones. 9. Ninja Space Vixens from Uranus. 10. Bureaucrats. 11. Clowns. 12. Monkeys trying to type Hamlet. 13. Black cats, ladders, and broken mirrors. 14. Wild Pokémon. Especially Voltorbs, Electrodes, and Jigglypuffs. 15. It's the real location of Hogwarts (because you couldn't hide a castle capable of housing 600 junior wizards anywhere in Scotland). 16. Sparkle Ponies. 17. Snow, it's a giant floating ski resort. 18. Your mother. 19. Things too horrible to imagine. 20. The kingdom of Arendelle. 21. Pennies. 22. Helium, that;s why it floats. 23. Pink elephants. On parade, of course. 24. Antimatter. 25. Lions and tigers and bears (oh my). 26. Rubies and diamonds. 27. Scrambled eggs with cheese and mushrooms. And sausage on the side. 28. Khajiit. 29. A 17000 x 17000 x 17000 Rubik's Cube. Good luck solving it. 30. Copies of Destiny 2.