So, I am not really putting this out here to be added to the game, it's more of just an Idea. Granted, it would be great to have it, but I don't expect it to be added.
So, I think it would be really neat if we got an instant-use battlesong (similar to the rude interlude or startling soliloquy) that allows Wigfrid to perform one Area of Effect Attack. This battlesong would cost 1 papyrus, 1 feather pencil, and 1 thick fur. I say thick fur because it has the least amount of value between all the boss drops and the Bearger has the biggest AoE potential. I think it would be nice to have an AoE attack for characters besides just Wendy and Winona if the catapults count. I think it would be most in-character for Wigfrid to get a forge hammer-style AoE attack that she can use when she has enough inspiration.