On Topic: There should be a limit to HP. Anything 10 and below goes perhaps?
I thought about something like that, but actually there aren't many creatures with 10+ life points. Still a possibility. What would a good amount be? Less then 7 is too weak comparing to Fire Nymph, but more doesn't really exclude much.
Making it destroy only lower HP creatures makes it a much weaker Otyugh. I can also drop it's HP, but I don't think it is that unbalanced at the moment. Just think about my comparison with Red Nymph in the notes. The mode with not allowing it attack when ability was used may be the right choice, though.
You could use what I did with Natural Selection Survival Trait: If both ATK and HP are equal, kill the one with negative modifiers. If still the same, kill the one towards the edge of the field
Sounds good, thanks!