I'm not sure why you started a new thread for this, but... well, I'm also not sure what you're trying to do with this skill. And you didn't describe what you wanted it to do here.
Here's what it looks like your code will do:
When the character uses the skill Limit, it will put them into the Limit state. It will then call a common event. The common event will check the player's HP, and then, if it is below 75, will cast Limit all over again, potentially locking the game, because there's nothing that will stop the loop.
Were you trying to have Limit kick in automatically when Nido's HP are 75 or less?
Because if you are, you've got a couple of things backwards. The common event needs to call the skill before the skill is used. If that's what you want, you'll want to remove the Common Event call from the skill, and put it in a Battle Event that runs every turn. And once you've done that, you don't need a skill to put the Limit state on someone-- Change State will do that without fail.