This is a pretty massive ability because it means you can stack flying, trample, and other counters in addition to +1/+1 counters to make a one-shot monstrosity that doesnt ever really go away

Goliath Truck Grond, the Gatebreaker Guidelight Pathmaker Haunted Hellride Heart of Kiran Hedge Shredder High-Speed Hoverbike Hoard Hauler Honeymoon Hearse Hulldrifter Imperial Recovery Unit Imposter Mech Invasion Submersible Irontread Crusher Jackdaw Jetfire, Air Guardian Knight Paladin Kylox's Voltstrider Lifecraft Engine Lumbering Worldwagon Luxurious Locomotive Magicked Card Magitek Armor Magmatic Galleon Marauding Dreadship Marshals' Pathcruiser Mechtitan Core Megatron, Destructive Force Meldweb Strider Midnight Crusader Shuttle Midnight Mangler Mighty Servant of Leuk-o Mindlink Mech Mizzium Tank Mobile Garrison Mobile Homestead Mobilizer Mech Mole Module Mukotai Soulripper Mysterious Limousine N'Yami-Class Mother Ship Nautiloid Ship Necron Monolith Night Scythe Optimus Prime, Autobot Leader Ovalchase Dragster Parhelion II Passenger Ferry Peacewalker Colossus Phantom Train Phoenix Fleet Airship Possession Engine Prodigy's Prototype Prowl, Pursuit Vehicle RMS Titanic Raiders' Karve Rangers' Aetherhive Rangers' Refueler Ratchet, Rescue Racer Reaver Titan Reckoner Bankbuster Recon Craft Theta Renegade Freighter Ribskiff Ripclaw Wrangler Rocketeer Boostbuggy Rolling Hamsphere Rover Blades Royal Talon Fighter Jet S.H.I.E.L.D

However, if those permanents entered the battlefield in the opposite order, your maximum hand size would be two
Lulu, Stern Guardian, Rikku, Resourceful Guardian, and Wakka, Devoted Guardian are all Precon cards that are on the lower end of things financially