Very interesting post. I am curious how it will be.

For me it was always strange that cards loose in the last step to max-level something, f.e. the Divine Sorceress who gain +1 attack but loose 1 life. I was always thinking why not to start deeper, so that every level bring something.

Other example: The Flesh Golem loose three times (Level 3 to 4, Level 6 to 7 and Level 8 to 9) one life.

or one more example: The spineback Turtle loose from 4 to 5 and from 8 to 9 one lifepoint.

Also monsters like Crustecean King, Devine Healer, Fire Beetle or Wood Nymph looses life points by leveling up.

By the Devine Healer it's in my opinion the question if he is not better in level 5-version than in level 6-version.
For the ability slowing (who is very bad for you in reverse speed by the way) he loose 1 speedpoint and one 1 lifepoint.