Predaplant Rokket (It does have synergy)

• Harpie's Feather Duster is Forbidden
• 3 copies of Lonefire Blossom, which is Semi-Limited (at most 2)
• 52 cards first released after HAT's card pool closed (2014-08-13): Absorouter Dragon, Aromalilith Rosemary, Aromaseraphy Jasmine, Ash Blossom & Joyous Spring, Boot Sector Launch, Borrelend Dragon, Borreload Fatalflare Dragon, Borrelshroud Dragon, Breachborrel Dragon, Bystial Dis Pater, Bystial Druiswurm, Bystial Magnamhut, Called by the Grave, Clear Wing Synchro Dragon, Crossout Designator, Destrudo the Lost Dragon's Frisson, Double Interlock, Fantastical Dragon Phantazmay, Fusion Substitute, Ghost Belle & Haunted Mansion, Guardragon Pisty, Lightning Storm, Mardel, Generaider Boss of Light, Mulcharmy Fuwalos, Mulcharmy Meowls, Mulcharmy Purulia, Nibiru, the Primal Being, Predaplant Ambulomelides, Predaplant Bal Teah, Predaplant Byblisp, Predaplant Darlingtonia Cobra, Predaplant Dragostapelia, Predaplant Lilizard, Predaplant Longinephila, Predaplant Ophrys Scorpio, Predaprimitive, Predapruning, Princess Dracaena, the Thirsting Tree, Quick Launch, Rokket Barrage, Rokket Caliber, Rokket Detonator, Rokket Loader, Rokket Recharger, Rokket Tracer, Silverrokket Dragon, Starving Venom Wing Dragon, Striker Dragon, Triple Borrel Launch, Triple Tactics Thrust, Trisborrel Dragon, Ultra Polymerization

Checked against the HAT format Forbidden & Limited list (April 2014) as of 1 April 2014 and its card pool (no card first released after 13 August 2014), with the sizes and copy limits of a TCG deck.

Not checked: the TCG card pool (a card released only in the OCG).