The one remaining frog will being by slashing at Bergthora. The frog misses. And misses again with it's horn. It has just 4 AP, because it was partly stunned last round, needing only 1 AP each for bodily attacks, so it has just enough to get to 1014, whereupon it faces Bergthora and Embla.
The party's move (comments below) kills the last of the creatures. Here is the final tally of x.p.: