I will soon start a game of Necessary Evil, and one of my players will have the Elemental Attack (fire) superpower, and I am not completely sure if I understand the rules correctly.
Anytime something ﬂammable is hit by fire, roll 1d6. On a 6, the target catches fire
After a hit I roll a d12 (rules from the superpower, normally it would be d6) and check if the result is 6 or more to see it the enemy catches fire. If yes the enemy gets one stack of "burning".
According to the Necessary Evil rules, I have to improve the flammability rating by one step instead of rolling a d12:
Each round after a victim catches fire (at the beginning of his action), roll as if checking to see if the victim catches fire again. If he does, the fire grows in intensity and does its current level +2 in damage that round. This is cumulative to +6.
Savage Worlds Explorers Edition, page 104
So I now have a burning drone with a toughness of 8 (2) that has one stack of burning. I now check with a d6 if he gets another stack, which he does not. Afterwards I calculate the burning damage for this round to be 3 points of damage, which is ignored as the toughness of the drone is higher.
For the fire to be effective it has to be stacked 4 times to deal the maximum damage of 6 and then automatically kills the drone (first round shaken, then a wound in the second one).
On the next page it says that I get 1d10 points of damage for a "spot fire", such as a burning arm or leg. Does that mean that a burning foe gets 1d10 + levels of burning + 2 points of damage each round?