I am pretty sure I have read about a guy using mammoths in a tactic guide topic and another one speaking about spending honor on chimeras.
So can you confirm all of these do not exist because I dont have them in the units menu:

Dragoon lvl 7 colosseum
Rune Knight lvl 8 colosseum
Water Elemental2 lvl 2 spire
Archmage lvl 5 spire
Fire Elemental2 lvl 8 spire
Mammoth lvl 4 den
Chimera lvl 7 den
Gnome2 lvl 2 lab
Air ship2 lvl 2 lab
Flaming Trebutchet lvl 5 lab
Poison Catapult lvl7 lab
Sappet Wagon lvl 8 lab
Poison Trebutchet lvl 9 lab

Thanks!