"Kingdom Rush Origins first Endless Mode!" so the blog proclaims, perhaps implying a future endless mode? I know not if anyone has yet made a thread regarding this matter, but I feel it should be brought to light.
This is merely speculation, but since this "Razz and Rags" hero is based upon the gnomes, might it be appropriate that the potentially forthcoming endless mode would be related likewise? All of which is, of course, if there is to be a second endless mode. The other likely option is that the title was simply misleading or mistyped.
Discuss away or bake a batch of muffins, whatever suits your fancy.