I'm in Chapter 4, trying to create an overpowered "infinite" farming setup as Necromancer. I've got vampire mansions, battlefields and abandoned bookeries covering every tile, to try and spawn Prime Matters to get more golden cards. This setup somehow got stuck on loop 20, in a fight with a Ghost of a Ghost that just won't die - his health regenerates faster than I seem to damage it, probably due to the vampiric aura:

https://imgur.com/a/VGqSqie

The word "evade" shows up on it all the time, but I don't see any mechanic that's granting it evade? Is this because of the crossbowmen, or is there some hidden mechanic that makes it resistant to physical damage?