Speaking of the Extinction form, will it have a form exclusive weapon? If so then what? I propose giving it a spear

I think it should just be fighting ability.

that, or a big spinal cord sword.

Just fighting ability is kinda bland..I mean even putotyra got an ax

Plus paleo already has a sword in quadro form but not a spear, maybe the type used for hunting

I like the idea of a spear, but can it be a 2 in 1 weapon, maybe the second mode being a rifle?

Yeah that was what I was gonna suggest next

Let's save the weapon idea for when we start discussing the weapons. Let's just discuss the Extinct's design now.

I'm not really fond of the spear idea for Extinction. Stabby, stabby just doesn't seem as savage or brutal as slashy, slashy or bashy, bashy.

(But honestly, I've been coming up with my own ideas for the secondary rider on the side and I think their primary weapon should be a spear. :o)

How about we make them humanoid mass of bones held together by amber

A skeleton encased in amber?

No something like dipping a stick covered in glue in a bucket of sand and gravel with the sand and gravel(bones and fossils) covering the glue (amber) but some exposed parts where you can see the amber . that's just their main body though, they'll still be using weapons and wearing armor made from whatever they want