Well, as an addicted blood-magic user I can only agree with Sombre. This is the *only* boring thing about late game in most of my games.
Additionnally, I often play at night when I can't find sleep after nursing the babies...and I can't count how many times I got a yelling "Stop those ******-****ing clicks please" or the like from my wife sleeping close by.
Not so surprisingly, it seems to happen a lot less when I play a non-blood nation...
Devs, please save my marriage!
