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 NINJAGO 70655 DRAGON PIT (2018) NEW SEALED
LEGO Ninjago Dragon Pit 70655 Ninja Dragon Building Toy
Lego Ninjago 70655 Dragon Pit
LEGO Ninjago Dragon Pit 70655 Ninja Dragon Building Toy