I finally came up with a way to upgrade Slab (Ninjago 70655) I'm completely happy with. I didn't like the previous horns/blades. There's a bar now that runs through the head. Its
LEGO Dragon Pit (70655, LEGO Ninjago) - buy at Galaxus
New Ninjago LEGO Arkade Hunted Ninja Dragon Hunter Minifigure 70655
Amazon.com: LEGO NINJAGO Masters of Spinjitzu: Dragon Pit 70655 Ninjago Toy Building Kit with Green Dragon Model, Ninja Action Battle Playset for Kids (1660 Pieces) (Discontinued by Manufacturer) : Toys & Games
Fosso de Dragão 70655 - Sets LEGO® NINJAGO® - LEGO.com para crianças
LEGO Dragon Pit (70655, LEGO Ninjago) - buy at Galaxus