Ok, this:
Name:jack-in-the-box|jack-in-the-box
Element:entropy
Cost:5
|6
Attack/hp:x/y|x/y
Effect:x and y change to a random number between 0 and 7|1 and 9 at the start of your turn. X/y=randomness-total damage/total attack increase/reduce done to this card. This can have it negative hp at the start of your turn, wich means it will die if not healed to positive hp
Howzat?
Or:
Name:giant wall|collossal wall
Element:earth
Cost:8
|1
Attack/hp:0/40|0/60
No effect, but it works awsome with aflatoxin, rage elixir or gravity pull!
That's it!