I agree, there are some very interesting ideas here.
Vitamor: What about Soul Catcher?
Fierqua: I feel that the fire ability itself is not overpowered, but that it enables imbalance
Aethonos: this turns all the pillars/pends the opponent plays on his/her first turn into super bonus for me. In other words, my pillars/towers become pillars+1/Tower+1
Dissa: List positive and negative specifics
Teries is my favorite of this series.