He has a cast trigger for Auras, Equipment and Vehicles to draw a card
It's cheap, harder to kill, and is never innately card advantage
You'll need to manage your deck carefully to reap the full rewards of this strategy, but it's super satisfying when you do
The retro cards omitted from the draft packs (allegedly to help the draft environment) are: Aetherize Creeping Chill Darkblast Enter the Infinite Gigantoplasm Karn's Bastion Magewright's Stone Maze's End Narcomoeba Niv-Mizzet Reborn Pack Rat Perilous Forays Pithing Needle Rest in Peace Shambling Shell Shattering Spree Sphere of Safety Supreme Verdict Thespian's Stage Turnabout Wilderness Reclamation The alternate art anime borderless cards also appear in both Draft and Collectors Boosters
Clavileo also gives them a second ability that if that creature dies, you get a 4/3 token with flying and you draw a card
That means Goobbue Gardener, Scorpion Sentinel, Town Greeter, and Qiqirn Merchant