4|3
for 3|3 was meant to refer to a 3 attack, 3 HP creature that costs 4 unupped and 3 upped.
Given that the stats and cost are so sensitive to the purpose of this card, I'm not sure it really needs HP that much. It risks being OP with other combos.
You mentioned SoPa for example -- if this card's HP aren't so high, it's not really as good as an otyugh -- which is good because it's in-element.
Anything that freezes, of course, is an in-element workaround. But I think it's better to make people work for that combo instead of building it in and then requiring a higher cost.
I'll update the card for now and wait for more feedback.