It's not like anybody is going to answer this, anyway.
I set up a condition for a Regen state in Tankentai 3.4:
when 19 # Regen
return [["hp", 0, -10, true, true]]
And put this in the state's notebox:
<slip: hp, 0, -10%>
But it's not working. Does anybody know what the problem is?