So, rules question I’ve been chewing on.
In a game a few months ago, we were fighting a giant. He’d taken a few arrows from the Ranger and was in pretty bad shape, but he was closing in on the sniper perch, so I had my thief explode out of the underbrush from behind and drive his rapier into the brute’s Achilles tendon, hoping to lame him.
GM ruled it was a Backstab, which given the fiction seemed appropriate. I rolled, and got a 10+. I chose Avoid Melee and Deal Damage. I SHOULD have picked Grant Advantage, because it fit the fiction better, but I picked Deal Damage. I figured I’d hurt him a bit more, and also, fictionally, he’d be lame. The GM didn’t quibble with my choice.
In retrospect, it’s not surprising I reduced the giant to 0HP. By stabbing him in the foot. The rules explicitly state that when a monster reaches 0HP it dies. This is obviously very wrong for this situation, and the GM played it as him being incapacitated and surrendering. Which worked fine.
But I’m wondering how to avoid this in the future, other than not letting HP damage dealing moves trigger unless you’re going for the kill?