[quantum_mechani]

Tartarians are not that hard to get late game, you hardly need the 3d artifact. A liche with a staff, a skullface, and a ring of sorcery (or the book of black secrets, or the robe of the magi) can cast it. And it's quite possible to bootstrap your way to liches with even a little bit of death. The whole process is even easier if you can trade for some items.

Making abominations cheaper doesn't help much of anything, they already get used often, and it's not like they are any kind of direct competition to tartarians. Iron dragons I'm actually not a big fan of, I might be open to a slight price drop, but it sounds like they are getting used as is.