I don’t know if you can ever remove the last line, or some way that the opponent may have a shot to work through the ability. Otherwise, you slap the card down and it’s a free soul. I don’t think any theme deserves a free soul card from their niche dominant, even if there is strict unity requirements. I do like the exodus unity requirement. But, I just don’t know if you can make the card without including the last line or something similar so it’s more of a “most of the time” battle winner versus an iron clad “all the time” battle winner.