Personally I would never use this card...
I have to pay to play it and then unless I splash water I'm stuck taking 2 damage per turn.
On top of that it has a 60% chance to duplicate itself each turn, which may very well add another to my side of the field and damage me more.
Turn after that.. another 60% chance from both to generate a copy which may or may not be on my side and damage me more.
The deviation in effect possibilities here is way too high for this card to be used reliably...
Best case scenario- I play it, it duplicates to my opponent, I hit myself with a water card, the opponent's duplicates stay on their side, I'm a happy camper.
Worst case scenario - I don't have water splashed in, my opponent doesn't use water, every damn copy stays on my side of the field and eventually I take lethal damage each turn with no permanent slots...