"Hideaway N" means "When this permanent enters, look at the top N cards of your library
The only issue, assuming you don't consider costing ten mana an issue, is that resolving four cascades in a row can get complicated, especially when individual cascades hit other cascade spells mid-resolution
$0.35 Beasts of Bogardan Chronicles $0.79 Nebuchadnezzar Chronicles $0.49 Triassic Egg Chronicles $1.29 Chromium Chronicles $0.35 Cocoon Chronicles $0.35 Craw Giant Chronicles $0.39 Storm Seeker Chronicles $0.59 Juxtapose Chronicles $0.59 Indestructible Aura Legends $0.59 Sentinel Chronicles $0.59 Axelrod Gunnarson Chronicles $0.49 Ayesha Tanaka Chronicles 0 results found
(I used it once before many years ago in a column during Soldier Week.) Also, was the trivia to easy, too hard or just right
Outside of the Hydra box, Id look to make Gargos even larger and start killing people with commander damage
Oko homogenized deck-building so impressively that if your deck had even the slightest hint of Blue or Green, then congratulations