Best Answer Chris Goodwin , 22 April 2017 - 02:21 PM
Do you want it to always be the same penalty to the roll? Like, when hit the target rolls at -3? Or do you want it to be based on the amount of damage done?
Change Environment is the classic "make a DEX Roll or fall prone" Power. If you want a constant value, buy that much. Forcing a roll costs 3 points for -1, so -3 would be 9 points. If you want a variable amount, buy a larger value (say, -10) and add a Limitation, like "Max penalty equal to BODY done."
You would add the Instant (-1/2), No Range (-1/2), and Linked To Paw Smash (-1/2) or whatever you call the combined attack. The real cost would be (9 / 2.5) 3.6, which rounds to 4 Real Points. That would add to the cost of the Paw Smash, so it would look something like:
Paw Smash: HKA, 1d6 vs. PD (2d6 with STR) (Real Cost: 15 points) plus Change Environment (fall prone, -3 to STR or DEX Roll, whichever is better) (9 Active Points); No Range (-1/2), Instant (-1/2), Linked to HKA (-1/2) (Real Cost: 4 points). Total Real Cost: 19 points. END Cost: 2 (+1 if 10 or 15 STR used).
That does exactly it.
Edit: This assumes the bear has 15 STR, which costs 1 END; the HKA costs 1 END, and the Change Environment costs 1 END. If the bear has more STR, you can add whatever the bear's STR damage is; if he has 20 STR, he'll spend 1 for the HKA, 2 for the STR, and 1 for the CE, to do a total of 2d6+1. It could be rewritten thusly:
Paw Smash: 2d6 melee Killing (includes Strength); when hit, target must make STR or DEX Roll at -3 or fall prone. END Cost: 3.Go to the full post