Mojko wrote:
How about this?
Replace a common Unliving card from hand with non-rare Unliving. Chance for replacing common with uncommon is 5N. N = # Unliving cards in hand.
In my opinion:
Replace a common card from hand with uncommon 
Unliving. Chance for replacing common with uncommon is 5N. N = # 
Unliving cards in hand.
or
Replace a non-rare card from hand with non-common 
Unliving. Chance for replacing  is 5N. N = # 
Unliving cards in hand.
Second suggest is more exciting :)