"Each mech has a special gem embedded in its body, underneath the chest plate. This is a failsafe. If the mech is destroyed, this gem detonates as a 20d6 fireball - a tremendous fiery cloud about 40 feet in diameter. This makes the automaton particularly dangerous as the explosion below deck might breach the ship's hull. If the player characters can somehow get it up on deck or off the ship before it detonates, the damage will be less severe."
If the gem is under the chest plate I assume its not visible, so how are the players suppose to know it will blow up? Even if they could see the gem they probably wouldn't know what it was for since most golems have gems in their chest that keeps them alive.
If the gem is under the chest plate I assume its not visible, so how are the players suppose to know it will blow up? Even if they could see the gem they probably wouldn't know what it was for since most golems have gems in their chest that keeps them alive.