Abyssal Slags Should Disappear

[BigCook]

While they're a balancing aspect of alchemy's risk/reward, they are maybe too extreme when casting implosion first round on anyone that enters LoS, such as poor unfortunates that wander into the lab hours after the alchemist has fled and condemned the place. It's probably for the best that slags teleport home after a short while stood idle, otherwise, every alchemy lab has to be designed to not allow slags to see or move to the transition that leads to them if you want to prevent DC27 death-ward-bypassing instant death spells hitting players who just came to the explorable for a good time.